优质食味粳稻控混肥一次性基施效应

doi:10.3864/j.issn.0578-1752.2021.07.006

Abstract

Abstract:

【Objective】In this experiment, the mixed controlled-release nitrogen (N) fertilizer (composed of two controlled-release N fertilizers with different release periods) and conventional N fertilizer were mixed and then applied as base fertilizers at one time under mechanical pot-seedling transplanting, with a view to select the optimal mixed controlled-release N fertilizer treatment that matched the nutrient absorption of late mid-season japonica rice with good taste quality, so as to provide a scientific basis for high-yield and simplified fertilization of that type of rice under mechanical pot-seedling transplanting.【Method】The experiment was carried out in the rice season of 2018-2019 (May-October). The two late mid-season japonica rice and more panicles cultivars with good taste quality, including Nanjing 9108 and Fengjing 1606, were used as materials under the pure nitrogen condition of 270 kg·hm ^-2. A mixed controlled-release N fertilizer and a conventional nitrogen fertilizer were combined at a ratio of 5﹕5, and the mixed controlled-release N fertilizer consists of two kinds of controlled-release fertilizers with different release period at a ratio of 4﹕1. Six combinations were set up, including 60 d + 40 d, 60 d + 80 d, 80 d + 60 d, 80 d + 100 d, 100 d + 80 d, and 100 d + 120 d, and conventional urea split fertilization (CK) was used as a control. Then, the yield, population quality index and characteristics of nitrogen absorption and utilization were measured.【Result】The results showed that, compared with CK, the yield of Nanjing 9108 and Fengjing1606 under 100 d+80 d treatment were increased by 4.66% and 4.29% on average for two years, respectively. The increase of grain yield was due to the significant increase in effective panicles per unit area and total spikelet per unit area, and grain number per panicle and filled-grain percentage had no significant difference between 100 d+80 d, 100 d+120 d treatments and CK. The grain yield under 100 d+120 d treatment was next to 100 d+80 d treatment, except for the 100 d+120 d treatment of Nanjing9108 in 2019. There was no significant difference in yield between 80 d+60 d, 80 d+100 d treatments and CK for two years. Compared with CK, the yield under 60 d+40 d and 60 d+80 d treatments was significantly reduced. From sowing to jointing, the group N accumulation under the mixed controlled-release N fertilizer treatments increased, compared with CK, with an average increase of 14.86%, which promoted the occurrence of group tillers and the simultaneous increase in LAI and net assimilation rate, improved photosynthetic productivity, and then increased dry matter accumulation. From jointing to heading, the N accumulation and dry matter accumulation of only 100 d+80 d, 100 d+ 120 d treatments were at the highest level with CK, which increased by 47.02%-55.01% and 14.52%-18.15% respectively, compared with the lowest 60 d+40 d treatment. Compared with the treatments of 100 d+80 d and 100 d+120 d, the net assimilation rate under CK was increased relatively, but the LAI at heading stage decreased significantly. From heading to maturity, the nitrogen accumulation under 100 d+120 d treatment was significantly higher than other treatments, which was increased by 9.23%-22.03% compared with CK. However, the dry matter accumulation under 100 d+80 d and 100 d+120 d treatments was at the highest level, which was significantly increased by 5.44%-8.58% compared with CK, which might be due to that N release under 100 d+80 d and 100 d+120 d treatments, and it could improve photosynthetic leaf area and net assimilation rate relatively coordinately, resulting in relatively sufficient photosynthetic production after heading; While the net assimilation rate of CK was relatively high, but the photosynthetic leaf area was relatively insufficient. With regard to N use efficiency, N partial factor productivity (NPFP) and N agronomy efficiency (NAE) under 100 d+80 d treatment respectively was increased by 3.90%-4.92% and 9.42%-11.93%, compared with CK; The apparent N use efficiency (ANE) under 100 d+80 d and 100 d+120 d treatments was increased by 5.29%-7.21% and 5.79%-8.51%, respectively, compared with CK.【Conclusion】The N release under the 100 d + 80 d and 100 d + 120 d treatments was most consistent with nutrient absorption of Nanjing 9108 and Fengjing 1606, which led to the formation of high-yield population and could be used as a nitrogen fertilizer management method for high-yield and simplified fertilization of late mid-season japonica rice with good taste quality by mechanical pot-seedling transplanting.

Key words: japonica rice with good taste quality, controlled release fertilizer, mechanical transplanting with pot-seedling, yield, nitrogen utilization

JIANG WeiQin,HU Qun,YU Hang,MA HuiZhen,REN GaoLei,MA ZhongTao,ZHU Ying,WEI HaiYan,ZHANG HongCheng,LIU GuoDong,HU YaJie,GUO BaoWei. Effect of One-Time Basal Application of the Mixed Controlled-Release Nitrogen Fertilizer in Japonica Rice with Good Taste Quality[J].Scientia Agricultura Sinica, 2021, 54(7): 1382-1396.

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Figures/Tables 10

Table 1

Table 2

Table 3

Table 4

Differences in yield and yield components of japonica rice with good taste quality under different combination of controlled-release fertilizers"

年份 Year	品种 Cultivar	处理 Treatment	单位面积穗数 Panicle number (×10⁴ hm^-2)	每穗粒数 Spikelet number per panicle	结实率 Seed-setting rate (%)	千粒重 1000-grain weight (g)	群体颖花量 Total spikelet number (×10⁶ hm^-2)	产量 Grain yield (t·hm^-2)
2018	南粳9108 Nanjing9108	60 d+40 d	368.88bc	102.92d	96.71a	26.98a	379.62c	9.41d
		60 d+80 d	369.42bc	103.68d	96.60a	27.04a	382.96c	9.46d
		80 d+60 d	372.30abc	107.81c	96.39a	26.74a	401.36b	9.82c
		80 d+100 d	372.75ab	109.09bc	96.32a	26.65ab	406.64b	10.03bc
		100 d+80 d	381.15a	111.46ab	96.81a	27.06a	424.85a	10.37a
		100 d+120 d	377.90ab	110.48abc	96.44a	26.70a	417.35a	10.17ab
		CK	361.35c	112.71a	96.89a	26.11b	407.30b	9.89bc
	丰粳1606 Fengjing1606	60 d+40 d	372.83bc	93.77c	95.73a	28.23a	349.60c	8.98d
		60 d+80 d	372.32bc	95.04bc	95.51a	28.02a	353.84c	9.03cd
		80 d+60 d	373.13bc	97.00b	95.22a	27.98a	361.87bc	9.25cd
		80 d+100 d	378.27ab	100.19a	95.20a	27.89a	379.07ab	9.58ab
		100 d+80 d	385.83a	100.02a	95.62a	27.88a	385.89a	9.71a
		100 d+120 d	381.15ab	100.10a	95.39a	27.34b	381.52a	9.62ab
		CK	363.08c	102.48a	95.94a	27.21b	372.06ab	9.34bc
2019	南粳9108 Nanjing9108	60 d+40 d	378.90b	104.70c	95.63a	28.28ab	396.71d	10.35d
		60 d+80 d	379.89b	104.61c	95.58a	28.03b	401.16cd	10.40cd
		80 d+60 d	379.93b	108.49b	95.28a	28.29ab	412.19bcd	10.69bc
		80 d+100 d	383.25ab	111.34ab	94.54a	28.38ab	422.92ab	10.91b
		100 d+80 d	391.91a	111.68a	95.14a	28.18b	438.36a	11.23a
		100 d+120 d	385.81ab	112.47a	94.68a	27.93b	433.84a	11.25a
		CK	367.49c	112.80a	95.44a	28.68a	414.53bc	10.75b
	丰粳1606 Fengjing1606	60 d+40 d	385.14b	95.43d	95.18a	28.43b	367.53c	9.70d
		60 d+80 d	385.41b	95.81d	95.53a	28.67ab	369.26c	9.78d
		80 d+60 d	392.58ab	98.32c	94.48a	28.76ab	385.92b	10.09c
		80 d+100 d	393.30ab	99.83bc	94.45a	28.68ab	392.64ab	10.30bc
		100 d+80 d	402.72a	100.75ab	95.45a	28.74ab	405.59a	10.67a
		100 d+120 d	401.67a	100.58ab	95.10a	28.54b	403.94a	10.57ab
		CK	372.84c	102.45a	95.87a	29.18a	381.92bc	10.20c

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Differences in N accumulation and ratio of japonica rice with good taste quality at different growth stages under different combination of controlled-release fertilizers"

年份 Year	品种 Cultivar	处理 Treatment	播种至拔节 SS-JS		拔节至抽穗 JS-HS		抽穗至成熟 HS-MS
年份 Year	品种 Cultivar	处理 Treatment	积累量 Amount (kg·hm^-2)	比例 Ratio (%)	积累量 Amount (kg·hm^-2)	比例 Ratio (%)	积累量 Amount (kg·hm^-2)	比例 Ratio (%)
2018	南粳9108 Nanjing9108	60 d+40 d	107.84a	58.65a	56.94d	30.97d	19.08d	10.38e
		60 d+80 d	106.69a	57.36a	59.51d	31.98d	19.85d	10.67de
		80 d+60 d	101.92b	52.12b	70.57c	36.09c	23.07c	11.80cde
		80 d+100 d	98.86c	48.40c	78.50b	38.43b	26.88ab	13.16abc
		100 d+80 d	93.48d	45.24d	85.04a	41.14a	28.15a	13.62ab
		100 d+120 d	92.99d	45.03d	84.36a	40.85a	29.14a	14.11a
		CK	89.59e	44.99d	85.17a	42.77a	24.37bc	12.24bcd
	丰粳1606 Fengjing1606	60 d+40 d	106.57a	57.64a	57.16c	30.91d	21.17d	11.45d
		60 d+80 d	106.70a	56.90a	58.84c	31.39d	21.95d	11.71d
		80 d+60 d	103.01b	52.03b	69.11b	34.91c	25.86c	13.06c
		80 d+100 d	97.10c	47.07c	81.17a	39.33b	28.07bc	13.60bc
		100 d+80 d	92.06d	44.34d	86.08a	41.45ab	29.50b	14.21bc
		100 d+120 d	90.30de	43.37d	85.60a	41.11ab	32.32a	15.52a
		CK	87.07e	43.18d	85.03a	42.16a	29.59b	14.67ab
2019	南粳9108 Nanjing9108	60 d+40 d	106.52a	56.97a	58.73d	31.40d	21.74d	11.62b
		60 d+80 d	104.99a	55.68a	60.63d	32.14d	22.98cd	12.18b
		80 d+60 d	101.27b	50.60b	73.30c	36.62c	25.59bcd	12.78b
		80 d+100 d	97.63c	47.08c	83.18b	40.12b	26.53bc	12.80b
		100 d+80 d	93.97d	44.72d	88.87a	42.29b	27.29b	12.99b
		100 d+120 d	91.35d	42.88de	90.22a	42.35b	31.48a	14.77a
		CK	86.06e	42.30e	91.04a	44.75a	26.36bc	12.95b
	丰粳1606 Fengjing1606	60 d+40 d	107.76a	56.08a	59.34d	30.88e	25.07d	13.05c
		60 d+80 d	106.39a	54.62a	61.91d	31.78e	26.50cd	13.60bc
		80 d+60 d	103.30ab	50.55b	73.52c	35.96d	27.61bcd	13.78bc
		80 d+100 d	99.98b	47.26c	82.41b	38.94c	29.22bc	13.80bc
		100 d+80 d	94.66c	44.36d	88.29a	41.38b	30.41b	14.25bc
		100 d+120 d	92.57c	43.09d	87.24a	40.61b	35.01a	16.30a
		CK	86.71d	42.64d	87.95a	43.25a	30.64b	14.92ab

Table 9

Table 10

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[26]	胡雅杰, 钱海军, 曹伟伟, 邢志鹏, 张洪程, 戴其根, 霍中洋, 许轲, 魏海燕, 郭保卫. 机插方式和密度对不同穗型水稻品种产量及其构成的影响. 中国水稻科学, 2016,30(5):493-506.
	HU Y, QIAN H J, CAO W W, XING Z P, ZHANG H C, DAI Q G, HUO Z Y, XU K, WEI H Y, GUO B W. Effect of different mechanical transplantation methods and density on yield and its components of different panicle-typed rice. Chinese Journal of Rice Science, 2016,30(5):493-506. (in Chinese)
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[28]	周兴根, 张洪程, 常勇, 孙克新, 黄忠勤, 丁震乾, 王波. 淮北地区麦茬钵苗机插水稻的增产优势及其形成特征. 江苏农业学报, 2015,31(3):564-573.
	ZHOU X G, ZHANG H C, CHANG Y, SUN K X, HUANG Z Q, DING Z Q, WANG B. Yield advantages of machine-transplanted potted seedling of rice following wheat in Huaibei area. Jiangsu Journal of Agricultural. Sciences, 2015,31(3):564-573. (in Chinese)
[29]	王海月, 李玥, 孙永健, 李应洪, 蒋明金, 王春雨, 赵建红, 孙园园, 徐徽, 严奉君, 马均. 不同施氮水平下缓释氮肥配施对机插稻氮素利用特征及产量的影响. 中国水稻科学, 2017,31(1):50-64.
	WANG H Y, LI Y, SUN Y J, LI Y H, JIANG M J, WANG C Y, ZHAO J H, SUN Y Y, XU H, YAN F J, MA J. Effects of slow-release urea on nitrogen utilization and yield in mechanically-transplanted rice under different nitrogen application rates. Chinese Journal of Rice Science, 2017,31(1):50-64. (in Chinese)
[30]	李敏, 郭熙盛, 叶舒娅, 刘枫, 袁嫚嫚, 黄义德. 硫膜和树脂膜控释尿素对水稻产量、光合特性及氮肥利用率的影响. 植物营养与肥料学报, 2013,19(4):808-815.
	LI M, GUO X S, YE S Y, LIU F, YUAN M M, HUANG Y D. Effects of sulfur- and polymer-coated controlled release urea on yield, photosynthetic characteristics and nitrogen fertilizer efficiency of rice. Journal of Plant Nutrition and Fertilizers, 2013,19(4):808-815. (in Chinese)
[31]	张木, 唐拴虎, 黄巧义, 逄玉万, 易琼, 黄旭, 李苹, 付弘婷. 缓释尿素配施普通尿素对双季稻养分的供应特征. 中国农业科学, 2018,51(20):3985-3995.
	ZHANG M, TANG S H, HUANG Q Y, PANG Y W, YI Q, HUANG X, LI P, FU H T. The nutrient supply characteristics of co-application of slow-release urea and common urea in double-cropping rice. Scientia Agricultura Sinica, 2018,51(20):3985-3995. (in Chinese)
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月份 Month	平均温度 Average temperature (℃)		平均最高温度 Average maximum temperature (℃)		平均最低温度 Average minimum temperature (℃)		日照时数 Sunshine hours (h)		降水量 Precipitation (mm)
月份 Month	2018	2019	2018	2019	2018	2019	2018	2019	2018	2019
5月 May	22.4	22.2	26.8	26.7	19.1	17.7	55.9	80.6	157.5	33.5
6月 June	25.4	24.3	30.4	29.3	21.2	20.4	193.5	143.0	76.4	107.5
7月 July	29.0	27.7	33.1	32.0	25.8	24.5	224.9	128.9	116.6	122.1
8月 August	29.0	27.9	32.8	31.9	26.0	24.7	236.3	178.9	165.5	92.3
9月 September	24.8	23.7	28.7	27.9	21.5	20.4	136.4	149.3	30.9	144.1
10月 October	18.7	20.5	23.8	24.6	13.8	17.6	105.1	75.3	0.0	4.0

品种 Cultivar	处理 Treatment	分蘖盛期 Peak tiller stage (×10⁴ hm^-2)		拔节期 Jointing (×10⁴ hm^-2)		抽穗期 Heading (×10⁴ hm^-2)		成穗率 Percentage of productive tiller (%)
品种 Cultivar	处理 Treatment	2018	2019	2018	2019	2018	2019	2018	2019
南粳9108 Nanjing9108	60 d+40 d	624.00a	624.54a	579.78a	546.04a	386.35cd	392.81bc	59.12d	60.67d
	60 d+80 d	620.88a	622.50a	578.82a	545.62a	385.18cd	392.36bc	59.50d	61.03d
	80 d+60 d	605.70ab	614.79ab	572.28a	546.58a	394.32bc	398.03abc	60.89cd	61.80cd
	80 d+100 d	606.24ab	606.78b	576.60a	547.51a	397.18ab	407.36ab	61.49cd	63.17bc
	100 d+80 d	598.26b	606.72b	571.08a	543.43a	403.59ab	412.24a	64.51b	64.60b
	100 d+120 d	595.86b	605.34b	573.72a	546.86a	405.80a	414.39a	62.94b	63.73b
	CK	524.54c	524.91c	489.60b	492.67b	379.20d	386.17c	68.89a	70.01a
丰粳1606 Fengjing1606	60 d+40 d	571.94ab	606.45a	525.27a	522.28a	375.87c	397.20cd	63.62c	63.51d
	60 d+80 d	574.65a	601.62ab	524.13a	516.87a	379.89c	402.55bc	63.77c	64.06cd
	80 d+60 d	567.45abc	594.50abc	517.95a	520.02a	386.03bc	406.11abc	64.72c	66.05cd
	80 d+100 d	561.03abc	591.18bc	519.54a	516.34a	400.76ab	414.50ab	66.65bc	66.54bc
	100 d+80 d	557.40bc	585.00c	515.82a	520.79a	405.40a	416.62a	68.29b	68.84b
	100 d+120 d	552.15c	584.45c	517.56a	522.50a	403.09a	417.28a	68.38b	68.73b
	CK	497.45d	511.20d	473.76b	487.00b	379.55c	387.59d	72.38a	72.94a

品种 Cultivar	处理 Treatment	拔节期 Jointing		抽穗期 Heading		成熟期 Maturity		叶面积衰减率 Decreasing rate of leaf area (LAI·d^-1)
品种 Cultivar	处理 Treatment	2018	2019	2018	2019	2018	2019	2018	2019
南粳9108 Nanjing9108	60 d+40 d	5.37a	5.15a	6.96c	7.54c	2.93d	3.19d	0.0823a	0.0870a
	60 d+80 d	5.33a	5.13a	7.05c	7.58bc	3.03d	3.21d	0.0821a	0.0875a
	80 d+60 d	5.10b	4.99ab	7.28b	7.73b	3.26bc	3.44bc	0.0820a	0.0857a
	80 d+100 d	5.08b	4.89b	7.44ab	7.97a	3.41ab	3.62ab	0.0823a	0.0871a
	100 d+80 d	4.97b	4.71c	7.61a	8.12a	3.61a	3.78a	0.0816a	0.0868a
	100 d+120 d	4.96b	4.66cd	7.51a	8.10a	3.51a	3.79a	0.0816a	0.0860a
	CK	4.72c	4.52d	7.27b	7.63bc	3.07cd	3.27cd	0.0856a	0.0871a
丰粳1606 Fengjing1606	60 d+40 d	5.13a	5.23a	6.93c	7.30d	3.22c	3.42d	0.0757a	0.0761a
	60 d+80 d	5.12a	5.22a	6.99c	7.36cd	3.26bc	3.47d	0.0762a	0.0763a
	80 d+60 d	5.02ab	5.07ab	7.13bc	7.55bc	3.41b	3.72bc	0.0760a	0.0751a
	80 d+100 d	4.94ab	4.99b	7.33ab	7.72ab	3.62a	3.84b	0.0758a	0.0762a
	100 d+80 d	4.83b	4.92b	7.49a	7.89a	3.78a	4.01a	0.0757a	0.0760a
	100 d+120 d	4.82b	4.91b	7.45a	7.86a	3.79a	4.03a	0.0746a	0.0750a
	CK	4.56c	4.60c	7.12bc	7.60b	3.31bc	3.64c	0.0777a	0.0776a

品种 Cultivar	处理 Treatment	播种至拔节 SS-JS		拔节至抽穗 JS-HS		抽穗至成熟 HS-MS
品种 Cultivar	处理 Treatment	2018	2019	2018	2019	2018	2019
南粳9108 Nanjing9108	60 d+40 d	2.202a	2.093a	3.367d	3.665e	2.574c	2.742c
	60 d+80 d	2.192a	2.079a	3.400d	3.694e	2.593bc	2.744c
	80 d+60 d	2.164a	2.052ab	3.633c	3.952d	2.609bc	2.768bc
	80 d+100 d	2.093b	2.008bc	3.803bc	4.097c	2.616b	2.770bc
	100 d+80 d	2.041c	1.981c	3.938ab	4.312b	2.618b	2.799b
	100 d+120 d	2.028c	1.983c	3.929ab	4.325b	2.604bc	2.819ab
	CK	2.029c	1.879d	4.010a	4.471a	2.731a	2.864a
丰粳1606 Fengjing1606	60 d+40 d	1.991a	2.069a	3.244d	3.320c	2.482c	2.557c
	60 d+80 d	1.998a	2.058a	3.283d	3.355c	2.503bc	2.571bc
	80 d+60 d	1.978a	2.038a	3.432c	3.571b	2.527bc	2.571bc
	80 d+100 d	1.886b	2.019ab	3.666b	3.684b	2.529bc	2.595abc
	100 d+80 d	1.834bc	1.944bc	3.766b	3.870a	2.541b	2.613ab
	100 d+120 d	1.817bc	1.906cd	3.691b	3.860a	2.553b	2.631a
	CK	1.757c	1.825d	3.971a	4.004a	2.612a	2.639a

品种 Cultivar	处理 Treatment	播种至拔节 SS-JS				拔节至抽穗 JS-HS				抽穗至成熟 HS-MS
		2018		2019		2018		2019		2018		2019
		积累量 Amount (t·hm^-2)	比例 Ratio (%)	积累量 Amount (t·hm^-2)	比例 Ratio (%)	积累量 Amount (t·hm^-2)	比例 Ratio (%)	积累量 Amount (t·hm^-2)	比例 Ratio (%)	积累量 Amount (t·hm^-2)	比例 Ratio (%)	积累量 Amount (t·hm^-2)	比例 Ratio (%)
南粳9108 Nanjing9108	60 d+40 d	5.00a	28.00a	4.74a	24.65a	6.61c	37.04b	7.12d	37.09d	6.24d	34.96c	7.35d	38.26d
	60 d+80 d	4.96a	27.44a	4.70ab	24.36a	6.69c	37.04b	7.19d	37.28d	6.41d	35.52bc	7.40d	38.35d
	80 d+60 d	4.81b	25.71b	4.59bc	22.90b	7.12b	38.04b	7.67c	38.29c	6.79c	36.25abc	7.77c	38.81cd
	80 d+100 d	4.64c	24.19c	4.44cd	21.68c	7.53a	39.21a	8.01b	38.96bc	7.03bc	36.60ab	8.09b	39.36bc
	100 d+80 d	4.49d	22.92d	4.34d	20.52d	7.81a	39.84a	8.37a	39.62b	7.30a	37.25a	8.42a	39.86ab
	100 d+120 d	4.46d	23.10d	4.32d	20.44d	7.73a	40.02a	8.34a	39.45b	7.12ab	36.88ab	8.48a	40.11a
	CK	4.38d	23.21d	4.05e	20.17d	7.57a	40.12a	8.23a	40.95a	6.92bc	36.66ab	7.81c	38.88cd
丰粳1606 Fengjing1606	60 d+40 d	4.71a	27.15a	4.84a	26.06a	6.40c	36.88d	6.80d	36.60d	6.24d	35.96c	6.93d	37.33d
	60 d+80 d	4.73a	26.86a	4.81a	25.65a	6.51c	36.97d	6.90d	36.77d	6.37d	36.16c	7.05d	37.58cd
	80 d+60 d	4.65a	25.70b	4.71a	24.19b	6.81b	37.67cd	7.34c	37.69c	6.62c	36.64bc	7.38c	38.12bcd
	80 d+100 d	4.40b	23.61c	4.64ab	23.32b	7.33a	39.30bc	7.61b	38.24c	6.91b	37.08bc	7.64b	38.44abc
	100 d+80 d	4.25bc	22.41d	4.44bc	21.77c	7.53a	39.76ab	8.03a	39.33b	7.16a	37.83ab	7.94a	38.90ab
	100 d+120 d	4.20c	22.42d	4.35c	21.40c	7.35a	39.23bc	7.98a	39.26b	7.19a	38.35a	8.00a	39.34a
	CK	3.99d	21.81d	4.07d	20.89c	7.53a	41.20a	7.89a	40.50a	6.76bc	36.99bc	7.53bc	38.62ab

Effect of One-Time Basal Application of the Mixed Controlled-Release Nitrogen Fertilizer in Japonica Rice with Good Taste Quality

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处理 Treatment	基肥 Basal fertilizer							分蘖肥 TF	促花肥 SPF	保花肥 SDF
	控释肥类型 Types of CRU					尿素 U	复合肥 CF	尿素 U	尿素 U	尿素 U
	40 d	60 d	80 d	100 d	120 d	尿素 U	复合肥 CF	尿素 U	尿素 U	尿素 U
60 d+40 d	27	108				67.5	67.5
60 d +80 d		108	27			67.5	67.5
80 d +60 d		27	108			67.5	67.5
80 d +100 d			108	27		67.5	67.5
100 d +80 d			27	108		67.5	67.5
100 d +120 d				108	27	67.5	67.5
CK						47.25	47.25	94.5	40.5	40.5

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品种 Cultivar	处理 Treatment	氮肥偏生产力 NPFP (kg·kg^-1)		氮素干物质生产效率NUEB (kg·kg^-1)		氮素籽粒生产效率NUEG (kg·kg^-1)		氮肥农学利用率 NAE (kg·kg^-1)		氮肥表观利用率 ANE (%)
品种 Cultivar	处理 Treatment	2018	2019	2018	2019	2018	2019	2018	2019	2018	2019
南粳9108 Nanjing9108	60 d+40 d	34.87d	38.34d	100.77a	102.34a	51.21a	55.36a	13.26d	15.74d	35.83d	35.80e
	60 d+80 d	35.04d	38.54cd	100.72a	101.87a	50.85ab	55.17a	13.43d	15.94cd	36.64d	36.40e
	80 d+60 d	36.36c	39.60bc	99.50ab	99.69bc	50.20abc	53.42b	14.75c	17.00bc	40.16c	40.68d
	80 d+100 d	37.15bc	40.39b	97.62b	98.74cd	49.11c	52.60b	15.54bc	17.79b	43.38a	43.34bc
	100 d+80 d	38.42a	41.61a	98.83ab	100.17b	50.19abc	53.46b	16.80a	19.01a	44.28a	44.37ab
	100 d+120 d	37.68ab	41.66a	97.53b	98.87bcd	49.27c	52.80b	16.07ab	19.06a	44.21a	45.45a
	CK	36.62bc	39.83b	99.38ab	98.08d	49.66bc	52.86b	15.01bc	17.23b	41.48b	41.90cd
丰粳1606 Fengjing1606	60 d+40 d	33.26d	35.94d	96.01a	96.72a	48.57a	50.49a	12.99d	14.40d	35.57c	36.48c
	60 d+80 d	33.45d	36.21d	95.97a	95.96a	48.17ab	50.19a	13.18d	14.68d	36.54c	37.45c
	80 d+60 d	34.27cd	37.38c	93.29b	95.02a	46.74bc	49.38a	14.00cd	15.84c	40.42b	41.02b
	80 d+100 d	35.49ab	38.14bc	92.26b	94.12a	46.45c	48.67a	15.22ab	16.61bc	43.52a	43.68a
	100 d+80 d	35.95a	39.50a	93.09b	96.22a	46.75bc	49.99a	15.68a	17.97a	44.00a	44.32a
	100 d+120 d	35.62ab	39.14ab	91.88b	95.26a	46.19c	49.20a	15.35ab	17.61ab	44.21a	44.86a
	CK	34.60bc	37.76c	92.30b	95.27a	46.32c	49.66a	14.33bc	16.23c	41.79b	41.34b