Optimizing Irrigation and Nitrogen Management to Increase Yield and Nitrogen Recovery Efficiency in Double-Cropping Rice

被引:10
|
作者
Zhu, Haijun [1 ,2 ]
Zhang, Ting [1 ,2 ]
Zhang, Chunlan [3 ]
He, Xiaoe [1 ,2 ]
Shi, Ailong [1 ,2 ]
Tan, Weijian [4 ]
Yi, Zhenxie [1 ,2 ]
Wang, Xuehua [1 ,2 ]
机构
[1] Minist Educ Crop Physiol & Mol Biol, Key Lab, Changsha 410128, Peoples R China
[2] Southern Grain & Oil Crops Collaborat Innovat Ctr, Changsha 410128, Peoples R China
[3] Agr & Rural Bur Huaihua City, Huaihua 418099, Peoples R China
[4] Agr & Rural Bur Heshan Dist, Yiyang 413000, Peoples R China
来源
AGRONOMY-BASEL | 2022年 / 12卷 / 05期
基金
国家重点研发计划;
关键词
irrigation management; nitrogen management; grain yield; nitrogen use efficiency; photosynthetic characteristics; double-cropping rice; GRAIN-YIELD; DRYING IRRIGATION; WATER PRODUCTIVITY; ORYZA-SATIVA; SEEDED RICE; SEASON RICE; FERTILIZER; REGIMES; PHOTOSYNTHESIS; EMISSIONS;
D O I
10.3390/agronomy12051190
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Water and nitrogen are the key factors affecting the yield and nitrogen recovery efficiency of double-cropping rice, but information about optimizing nitrogen fertilizer and irrigation management to achieve high yield is still limited. The purpose was to study the effects of different nitrogen application rates (D1, D2, D3, D4 (0, 112.5, 150.0, and 187.5 kg ha(-1) for early-season rice and 0, 135, 180, and 225 kg ha(-1) for late-season rice)) and irrigation conditions (G1, Alternate wetting and drying irrigation, G2, flooding irrigation) on rice yield and nitrogen recovery efficiency. Field experiments were carried out in the early and late seasons of the subtropical environment in Heshan County, Hunan Province, China in 2018 and 2019. The results showed that the yield was increased by the comprehensive action of reasonable irrigation mode and nitrogen management. Under G1D4 and G1D3 treatments, the maximum grain yield of early-season rice was 7.42 t ha(-1), which was 0.8-35.9% higher than other treatments, and that of late-season rice was 8.20 t ha(-1), which was 13.3 similar to 67.0% higher than other treatments. The increase of yield in G1D4 and G1D3 treatments was due to the increase in dry matter accumulation, effective Panicles number, and Spikelets per panicle, whose increase was due to an increase in photosynthesis and nitrate reductase activity. Compared with other treatments, late-season rice G1D3 treatment achieved a higher yield with less nitrogen fertilizer, while early-season rice G1D4 treatment achieved the highest yield, but the nitrogen recovery efficiency decreased. We should focus on more effective nitrogen fertilizer and irrigation management to further improve the yield potential of double-cropping rice.
引用
收藏
页数:14
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