中国农业科学 ›› 2021, Vol. 54 ›› Issue (19): 4143-4154.doi: 10.3864/j.issn.0578-1752.2021.19.010
黄秋红1(),刘智蕾1(
),李鹏飞1,车俊杰1,于彩莲2(
),彭显龙1
收稿日期:
2020-11-14
接受日期:
2021-02-03
出版日期:
2021-10-01
发布日期:
2021-10-12
通讯作者:
刘智蕾,于彩莲
作者简介:
黄秋红,E-mail: 基金资助:
HUANG QiuHong1(),LIU ZhiLei1(
),LI PengFei1,CHE JunJie1,YU CaiLian2(
),PENG XianLong1
Received:
2020-11-14
Accepted:
2021-02-03
Online:
2021-10-01
Published:
2021-10-12
Contact:
ZhiLei LIU,CaiLian YU
摘要:
【目的】土壤是影响作物产量和氮肥吸收利用的因素之一,深入研究南北方稻田土壤对水稻生长及氮效率的影响,以期为调控区域水稻高产优质提供参考。【方法】2018—2019年,以黑龙江省黑土型水稻土,江苏省乌栅土型水稻土为试验材料,在黑龙江省哈尔滨市进行水稻盆栽试验。每种土壤设置3个施氮水平,即N0:不施氮肥;N1:0.87 g N/pot(相当于150 kg N·hm-2);N2:1.74 g N/pot(相当于300 kg N·hm-2)。测定水稻分蘖、SPAD值、分蘖成穗率、土壤矿化氮量、水稻产量和氮效率。【结果】黑土型水稻土的早期分蘖对施氮有响应,分蘖数随施氮量增加而增加,而乌栅土型水稻土的分蘖在拔节期后才对施氮有响应。土壤对水稻分蘖的影响存在年际间差异,2018年土壤类型对分蘖数有显著影响,不施氮时乌栅土型水稻土的分蘖数比黑土型水稻土高4.41%—43.04%,而施氮后乌栅土型水稻土比黑土型水稻土的分蘖数低8.25%—12.98%;2019年黑土型水稻土的分蘖数多数高于乌栅土型水稻土4.41%—46.53%。两种水稻土的分蘖成穗率与叶片SPAD值在2018年有显著差异,乌栅土型水稻土的叶片SPAD值比黑土型水稻土高19.28%—21.19%,乌栅土型水稻土的分蘖成穗率比黑土型水稻土高23.89%—40.53%,2019年土壤类型对水稻分蘖成穗率与叶片SPAD值均无显著影响。28 d淹水培养试验表明,两种土壤的无机氮总量基本相同,乌栅土型水稻土的初始矿化速率比黑土型水稻土高,但后期矿化速率比黑土型水稻土低,黑土型水稻土的矿化势更高,有更大的矿化潜力。黑土型水稻土的AEN(氮肥农学效率)比乌栅土型水稻土高,而乌栅土型水稻土的PFPN(氮肥偏生产力)比黑土型水稻土高,乌栅土型水稻土的Y0/Nr(Y0为无肥区产量,Nr为施氮量)更高,供氮与施氮更加协调。2018年黑土型水稻土的REN(氮肥吸收利用率)和PEN(氮肥生理利用率)均显著高于乌栅土型水稻土,2019年土壤类型对REN和PEN无显著影响。【结论】土壤差异不是南北方稻田氮效率差异的决定性因素,氮效率差异是土壤、气候和品种等因素共同作用的结果。相对于黑土型水稻土而言,前期养分供应能力强的乌栅土型水稻土应减施基、蘖肥,适当增施穗肥,以保证后期供氮促进水稻高产。
黄秋红,刘智蕾,李鹏飞,车俊杰,于彩莲,彭显龙. 相同气候背景下南北方稻田土壤上水稻生长及氮响应差异研究[J]. 中国农业科学, 2021, 54(19): 4143-4154.
HUANG QiuHong,LIU ZhiLei,LI PengFei,CHE JunJie,YU CaiLian,PENG XianLong. Difference in Nitrogen Responses and Nitrogen Efficiency of Different Paddy Soils in Southern and Northern China Under the Same Climatic Condition[J]. Scientia Agricultura Sinica, 2021, 54(19): 4143-4154.
表3
2018年与2019年水稻地上部干重、产量与氮效率"
年份 Year | 土壤类型 Soil type | 处理Treatment | 地上部干重 Dry weight (g/pot) | 产量 Yield (g/pot) | AEN (kg·kg-1) | PFPN (kg·kg-1) | Y0/Nr (kg·kg-1) | REN (%) | PEN (kg·kg-1) |
---|---|---|---|---|---|---|---|---|---|
2018 | 黑土型水稻土 Black paddy soil | N0 | 84.69c | 29.73c | |||||
N1 | 135.79b | 44.61b | 17.39a | 52.13a | 34.75a | 41.08a | 41.74a | ||
N2 | 178.80a | 67.04a | 21.69a | 38.97b | 17.28b | 49.09a | 44.22a | ||
乌栅土型水稻土 Gleyed paddy soil | N0 | 108.39c | 38.84c | ||||||
N1 | 139.44b | 50.09b | 13.08a | 58.23a | 45.15a | 34.89a | 37.56a | ||
N2 | 160.99a | 61.43a | 13.13a | 35.71b | 22.57b | 39.42a | 33.29a | ||
N | ** | ** | ns | ** | ** | ns | ns | ||
S | * | * | ** | ns | ** | * | * | ||
N×S | ** | * | ns | ** | ns | ** | ns | ||
2019 | 黑土型水稻土 Black paddy soil | N0 | 78.51c | 41.18b | |||||
N1 | 144.33b | 80.41a | 45.85a | 93.98a | 48.13a | 59.30a | 79.10a | ||
N2 | 168.83a | 83.52a | 24.61b | 48.55b | 23.94b | 54.10a | 45.81b | ||
乌栅土型水稻土 Gleyed paddy soil | N0 | 85.62c | 48.12c | ||||||
N1 | 149.84b | 83.17b | 40.75a | 96.69a | 55.94a | 58.86a | 70.46a | ||
N2 | 179.37a | 94.11a | 26.73b | 54.70b | 27.97b | 50.65a | 52.82b | ||
N | ** | ** | ** | ** | ** | ns | ** | ||
S | * | ns | ns | * | ** | ns | ns | ||
N×S | ns | ns | ns | ns | ns | ns | ns |
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