中国农业科学 ›› 2021, Vol. 54 ›› Issue (23): 4969-4983.doi: 10.3864/j.issn.0578-1752.2021.23.004
陶有凤(),蒲石林(
),周伟,邓飞,钟晓媛,秦琴,任万军(
)
收稿日期:
2021-02-19
接受日期:
2021-07-05
出版日期:
2021-12-01
发布日期:
2021-12-06
通讯作者:
任万军
作者简介:
陶有凤,E-mail: 基金资助:
TAO YouFeng(),PU ShiLin(
),ZHOU Wei,DENG Fei,ZHONG XiaoYuan,QIN Qin,REN WanJun(
)
Received:
2021-02-19
Accepted:
2021-07-05
Online:
2021-12-01
Published:
2021-12-06
Contact:
WanJun REN
摘要:
【目的】探明机插条件下减穴稳苗配置对杂交籼稻群体冠层质量的影响,为西南弱光稻区杂交籼稻机插栽培技术的推广应用提供理论支撑。【方法】2016—2017年采用两因素随机区组田间试验,因素1,2年均为不同田间配置,设常规配置(30 cm×12 cm)和减穴稳苗(30 cm×23 cm);因素2,2016年为不同株型水稻品种(F优498,中后期株叶型松散;宜香优2115,中后期株叶型上紧下披),2017年为不同基本苗(42×104/hm2和63×104/hm2);研究了不同田间配置对机插杂交籼稻群体冠层结构、光合特性和微环境(冠层温度、湿度和透光率)的影响。【结果】(1)减穴稳苗齐穗期能维持与常规配置相当的单茎绿叶面积、粒叶比和上三叶比叶重,其中2017年倒二叶与倒三叶比叶重显著增大;齐穗期剑叶光合速率、气孔导度、蒸腾速率分别较常规配置显著提高23.84%、23.53%和13.79%。(2)较常规配置,减穴稳苗显著增大各时期冠层幅度,提高冠层透光率,降低收敛指数,群体通透性更好;减穴稳苗处理提高了2016年F优498孕穗期和齐穗期的一次分蘖角度,而宜香优2115的一次分蘖角度2年均表现为减穴稳苗小于常规配置。(3)相关分析表明,孕穗期冠层日均温、昼夜温差和昼夜湿差与齐穗期剑叶和倒二叶比叶重呈显著或极显著正相关,与齐穗期收敛指数呈显著负相关;此外,孕穗期冠层日均温和昼夜湿差还与齐穗期冠层幅度呈显著正相关;齐穗期冠层日均温和昼夜温差与分蘖盛期、拔节期及齐穗后20 d的一次分蘖角度呈显著或极显著负相关,日均相对湿度则相反。减穴稳苗有效地改善了植株冠层结构,从而显著提高孕穗期和齐穗期的冠层温度和昼夜温差,提高孕穗期、齐穗期和齐穗后20 d的昼夜湿差,并显著降低日均相对湿度。【结论】减穴稳苗田间配置优化了机插杂交稻的群体冠层结构和光分布,增大了群体内部昼夜温差和湿差,降低了相对湿度,提高了群体质量和光合速率,为高产稳产奠定了基础,是西南弱光稻区进一步推进机插秧发展的重要技术途径。
陶有凤,蒲石林,周伟,邓飞,钟晓媛,秦琴,任万军. 西南弱光地区机插杂交籼稻“减穴稳苗”栽培的群体冠层质量特征[J]. 中国农业科学, 2021, 54(23): 4969-4983.
TAO YouFeng,PU ShiLin,ZHOU Wei,DENG Fei,ZHONG XiaoYuan,QIN Qin,REN WanJun. Canopy Population Quality Characteristics of Mechanical Transplanting Hybrid Indica Rice with “Reducing Hills and Stabilizing Basic-Seedlings” in Low-Light Region of Southwest China[J]. Scientia Agricultura Sinica, 2021, 54(23): 4969-4983.
表1
试验设计与秧苗质量"
年份 Year | 品种 Variety | 基本苗 Basic seedling | 田间配置 Field collocation pattern | 栽插规格 Planting specifications (cm×cm) | 穴苗数 Seedlings per hill | 叶龄 Leaf age | 白根数 White root number per plant |
---|---|---|---|---|---|---|---|
2016 | F优498 Fyou498 | LB | CFC | 30×12 | 1.5 | 2.72 | 9.38 |
RHSB | 30×23 | 2.9 | |||||
宜香优2115 Yixiangyou2115 | CFC | 30×12 | 1.5 | 2.75 | 9.77 | ||
RHSB | 30×23 | 2.9 | |||||
2017 | 宜香优2115 Yixiangyou2115 | LB | CFC | 30×12 | 1.5 | 2.73 | 9.50 |
RHSB | 30×23 | 2.9 | |||||
HB | CFC | 30×12 | 2.3 | ||||
RHSB | 30×23 | 4.3 |
表2
齐穗期不同田间配置的叶片质量"
年份 Year | 处理 Treatment | 单茎绿叶面积 Leaf area per stem (cm2/stem) | 粒叶比 Ratio of grain weight to leaf area (mg·cm-2) | 比叶重Specific leaf weight (mg·cm-2) | |||
---|---|---|---|---|---|---|---|
剑叶 FL | 倒二叶 L2 | 倒三叶 L3 | |||||
2016 | F优498 Fyou498 | CFC | 353.70a | 16.54a | 4.60a | 4.66a | 4.80a |
RHSB | 339.10a | 17.06a | 4.20a | 4.39a | 4.67a | ||
宜香优2115 Yixiangyou2115 | CFC | 339.92a | 11.81a | 3.37a | 3.83a | 3.99a | |
RHSB | 384.37a | 11.95a | 3.35a | 3.50a | 4.18a | ||
平均值 Mean | F优498 Fyou498 | 346.40a | 16.80a | 4.40a | 4.52a | 4.74a | |
宜香优2115 Yixiangyou2115 | 362.15a | 11.88b | 3.36b | 3.66b | 4.08b | ||
CFC | 346.81a | 14.18a | 3.98a | 4.24a | 4.39a | ||
RHSB | 361.74a | 14.51a | 3.77a | 3.94a | 4.43a | ||
ANOVA | 品种 V | 1.03 | 45.24** | 13.73* | 12.02* | 10.28* | |
配置 C | 0.92 | 0.20 | 0.56 | 1.45 | 0.03 | ||
品种×配置V×C | 3.62 | 0.7 | 0.46 | 0.02 | 0.61 | ||
2017 | LB | CFC | 331.74a | 13.90b | 3.62a | 4.15b | 3.82a |
RHSB | 322.64a | 16.14a | 3.90a | 4.42a | 4.18a | ||
HB | CFC | 314.67b | 14.12a | 3.80a | 4.26b | 4.02b | |
RHSB | 355.36a | 13.14a | 4.11a | 4.60a | 4.67a | ||
平均值 Mean | LB | 327.19a | 15.02a | 3.76a | 4.29a | 4.00b | |
HB | 335.01a | 13.63a | 3.71a | 4.43a | 4.34a | ||
CFC | 323.20a | 14.01a | 3.71a | 4.21b | 3.92b | ||
RHSB | 339.00a | 14.64a | 4.01a | 4.51a | 4.43a | ||
ANOVA | 基本苗 B | 0.75 | 4.72 | 1.47 | 5.47 | 7.61* | |
配置C | 3.06 | 0.96 | 3.66 | 23.67** | 16.91** | ||
基本苗×配置B×C | 7.60* | 6.32* | 0.01 | 0.33 | 1.46 |
表3
田间配置对关键生育时期一次分蘖角度的影响"
年份 Year | 处理 Treatment | 分蘖盛期 TS | 拔节期 JS | 孕穗期 BS | 齐穗期 HS | 齐穗20d 20dAHS | |
---|---|---|---|---|---|---|---|
2016 | F优498 Fyou498 | CFC | 8.42a | 20.82a | 12.01b | 7.32b | — |
RHSB | 4.33b | 17.57b | 13.97a | 9.53a | — | ||
宜香优2115 Yixiangyou2115 | CFC | 5.89a | 15.51a | 10.26a | 7.25a | — | |
RHSB | 4.32b | 15.04a | 10.30a | 5.89a | — | ||
平均值 Mean | F优498 Fyou498 | 6. 37a | 19.20a | 12.99a | 8.43a | — | |
宜香优2115 Yixiangyou2115 | 5.11b | 15.28b | 10.28b | 6.57b | — | ||
CFC | 7.16a | 18.17a | 11.14a | 7.29a | — | ||
RHSB | 4.32b | 16.31b | 12.14a | 7.71a | — | ||
ANOVA | 品种 V | 28.65** | 33.41** | 25.06** | 9.77* | — | |
配置 C | 142.82** | 7.52* | 3.43 | 0.51 | — | ||
品种×配置V×C | 28.35** | 4.24 | 3.16 | 9.01* | — | ||
2017 | LB | CFC | 6.72a | 19.40a | — | 13.62a | 11.75a |
RHSB | 5.41b | 15.16b | — | 11.12a | 9.88b | ||
HB | CFC | 5.74a | 14.37a | — | 10.38a | 7.87a | |
RHSB | 4.68b | 12.47a | — | 8.90a | 8.01a | ||
平均值Mean | LB | 6.07a | 17.28a | — | 12.37a | 10.81a | |
HB | 5.21b | 13.42b | — | 9.64a | 7.94b | ||
CFC | 6.23a | 16.89a | — | 12.00a | 9.81a | ||
RHSB | 5.04b | 13.82b | — | 10.01a | 8.94b | ||
ANOVA | 基本苗 B | 8.11* | 10.59* | — | 3.72 | 137.34** | |
配置C | 15.76** | 6.68* | — | 1.98 | 12.53* | ||
基本苗×配置B×C | 0.18 | 0.97 | — | 0.13 | 16.78** |
表4
田间配置对冠层日均温度与昼夜温差的影响(2017)"
处理 Treatment | 日均温Daily average temperature | 昼夜温差Diurnal temperature difference | |||||
---|---|---|---|---|---|---|---|
孕穗期BS | 齐穗期HS | 齐穗后20 d 20 d AHS | 孕穗期BS | 齐穗期HS | 齐穗后20 d 20 d AHS | ||
LB | CFC | 28.98b | 29.42b | 24.78a | 19.75b | 18.08b | 5.47a |
RHSB | 29.81a | 30.27a | 24.61a | 25.73a | 25.27a | 5.32a | |
HB | CFC | 30.19b | 30.47a | 24.52a | 27.13a | 24.80a | 5.68b |
RHSB | 30.53a | 31.16a | 24.66a | 28.18a | 27.48a | 6.17a | |
平均值 Mean | LB | 29.40b | 29.84b | 24.70a | 22.74b | 21.67b | 5.40b |
HB | 30.36a | 30.82a | 24.59a | 27.65a | 26.14a | 5.93a | |
CFC | 29.59b | 29.95b | 24.65a | 23.44b | 21.44b | 5.58a | |
RHSB | 30.17a | 30.72a | 24.64a | 26.95a | 26.37a | 5.75a | |
ANOVA | 基本苗B | 153.36** | 22.18** | 1.01 | 47.60** | 10.42* | 14.98** |
配置C | 56.49** | 13.92** | 0.02 | 24.34** | 12.75* | 1.50 | |
基本苗×配置B×C | 9.83* | 0.15 | 2.34 | 11.92* | 2.66 | 5.41 |
表5
不同田间配置对冠层日均相对湿度与昼夜湿差的影响(2017)"
处理 Treatment | 日均相对湿度Daily average relative humidity | 昼夜湿差Diurnal relative humidity difference | |||||
---|---|---|---|---|---|---|---|
孕穗期BS | 齐穗期HS | 齐穗后20 d 20 dAHS | 孕穗期BS | 齐穗期HS | 齐穗后20 d 20 dAHS | ||
LB | CFC | 88.22a | 90.71a | 98.98a | 30.07b | 23.03b | 1.17b |
RHSB | 81.70b | 84.52b | 98.37b | 40.88a | 40.49a | 4.71a | |
HB | CFC | 81.58a | 84.13a | 98.71a | 39.92b | 37.40a | 3.08a |
RHSB | 82.24a | 82.06a | 98.86a | 46.34a | 40.76a | 2.02b | |
平均值 Mean | LB | 84.96a | 87.62a | 98.67a | 35.48b | 31.76b | 2.94a |
HB | 81.91b | 83.10b | 98.79a | 43.13a | 39.08a | 2.55a | |
CFC | 84.90a | 87.42a | 98.84a | 35.00b | 30.21b | 2.12b | |
RHSB | 81.97b | 83.29b | 98.61b | 43.61a | 40.63a | 3.36a | |
ANOVA | 基本苗B | 27.96** | 44.69** | 2.06 | 19.56** | 7.65* | 2.02 |
配置C | 25.78** | 37.42** | 8.40* | 24.81** | 15.48** | 20.07** | |
基本苗×配置B×C | 38.58** | 9.31* | 23.04** | 1.61 | 7.09* | 69.39** |
表6
齐穗期不同田间配置的剑叶光合特征(2017)"
处理 Treatment | 净光合速率 Pn (μmol CO2·m2·s-1) | 气孔导度 Gs (μmol H2O·m2·s-1) | 胞间CO2浓度 Ci (μmol CO2·mol-1) | 蒸腾速率 Tr (mmol H2O·m2·s-1) | |
---|---|---|---|---|---|
LB | CFC | 14.45b | 0.46a | 301.70a | 6.15a |
RHSB | 16.38a | 0.48a | 294.51a | 6.07a | |
HB | CFC | 13.14b | 0.23b | 281.77a | 3.71b |
RHSB | 17.79a | 0.35a | 284.41a | 5.16a | |
平均值 Mean | LB | 15.41a | 0.47a | 298.11a | 6.11a |
HB | 15.47a | 0.29b | 283.09b | 4.44b | |
CFC | 13.80b | 0.34b | 291.74a | 4.93b | |
RHSB | 17.09a | 0.42a | 289.46a | 5.61a | |
ANOVA | 基本苗B | 0.01 | 111.16** | 30.65** | 169.42** |
配置C | 38.31** | 17.95** | 0.70 | 28.06** | |
基本苗×配置B×C | 6.58* | 8.17* | 3.28 | 35.03** |
表7
冠层结构与微环境的关系(n=12)"
处理 Treatment | 日均温度 Daily average temperature | 昼夜温差 Diurnal temperature difference | 日均相对湿度 Daily average relative humidity | 昼夜湿差 Diurnal relative humidity difference | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
孕穗期 BS | 齐穗期 HS | 齐穗后20 d 20 d AHS | 孕穗期 BS | 齐穗期 HS | 齐穗后20 d 20 d AHS | 孕穗期 BS | 齐穗期 HS | 齐穗后20 d 20 d AHS | 孕穗期 BS | 齐穗期 HS | 齐穗后20 d 20 d AHS | ||
比叶重Specific leaf weight | 剑叶FL | 0.59* | 0.28 | -0.16 | 0.63* | 0.47 | 0.36 | -0.56* | -0.49 | -0.46 | 0.73** | 0.52 | 0.36 |
倒二叶L2 | 0.64* | 0.47 | 0.03 | 0.61* | 0.60* | 0.42 | -0.57* | -0.64* | -0.63* | 0.68* | 0.77** | 0.34 | |
倒三叶L3 | 0.57* | 0.61* | 0.04 | 0.54 | 0.76** | 0.33 | -0.46 | -0.75** | -0.63* | 0.63* | 0.52 | 0.10 | |
一次分蘖 角度 Primary tillering angle | 分蘖盛期TS | -0.45 | -0.86** | -0.23 | -0.21 | -0.70** | -0.14 | 0.30 | 0.74** | 0.38 | -0.14 | -0.51 | -0.15 |
拔节期JS | -0.22 | -0.74** | 0.07 | -0.18 | -0.60* | 0.21 | 0.15 | 0.71** | 0.12 | -0.07 | -0.41 | 0.08 | |
齐穗期HS | -0.51 | -0.49 | -0.06 | -0.51 | -0.61* | -0.27 | 0.50 | 0.64* | 0.54 | -0.46 | -0.58* | -0.11 | |
齐穗后20 d 20 d AHS | -0.82** | -0.60* | 0.06 | -0.82** | -0.74** | -0.47 | 0.79** | 0.82** | 0.70** | -0.70** | -0.69** | -0.36 | |
冠层幅度Plant canopy width | 齐穗期HS | 0.57* | 0.36 | 0.18 | 0.54 | 0.56* | 0.51 | -0.54 | -0.52 | -0.63* | 0.63* | 0.51 | 0.48 |
齐穗后20 d 20 d AHS | 0.39 | 0.47 | -0.14 | 0.51 | 0.73** | 0.01 | -0.52 | -0.73** | -0.28 | 0.56* | 0.69** | 0.43 | |
收敛指数Plant convergent index | 齐穗期HS | -0.61* | -0.44 | -0.12 | -0.58* | -0.62* | -0.49 | 0.57* | 0.59* | 0.62* | -0.64* | -0.56* | -0.49 |
齐穗后20 d 20 d AHS | -0.47 | -0.46 | 0.18 | -0.62* | -0.76** | -0.08 | 0.62* | 0.77** | 0.35 | -0.66* | -0.75** | -0.49 |
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