Frequent alternate wetting and drying irrigation mitigates the effect of low phosphorus on rice grain yield in a 4‐year field trial by increasing soil phosphorus release and rice root growth,Food and Energy Security

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Frequent alternate wetting and drying irrigation mitigates the effect of low phosphorus on rice grain yield in a 4‐year field trial by increasing soil phosphorus release and rice root growth
Food and Energy Security ( IF 4.0 ) Pub Date : 2020-04-21 , DOI: 10.1002/fes3.206
Feiyun Xu _{1,

2,

3} , Tao Song ₄ , Ke Wang ₁ , Weifeng Xu ₁ , Guanglei Chen ₂ , Min Xu ₁ , Qian Zhang ₁ , Jianping Liu ₁ , Yiyong Zhu ₂ , Christopher Rensing ₁ , Jianhua Zhang ₅ , Wei Yuan ₁

Affiliation

The nonrenewable nutrient phosphorus (P) has low mobility in soil and is often present in forms that are unavailable to crop plants. Alternate wetting and drying irrigation is one of the widely promoted water‐saving irrigation techniques and can increase mineral nutrient availability; however, its interaction with P in paddy fields remains unclear. We conducted a 4‐year field experiment to determine whether a specific regime of frequent alternate wetting and drying (FAWD15) irrigation and low P usage (P45) had synergistic effects on rice yield, rice growth, water use efficiency (WUE), agronomic P use efficiency (AEp), and soil residual fertilizer P. We found that compared to the continuously flooded (CF) irrigation, FAWD15 irrigation maintained rice yield under low P usage condition in a 4‐year field trial. Our results also showed that under low P usage, FAWD15 resulted in high AEp and WUE, and reduced residual fertilizer P. Further, FAWD15 irrigation increased labile P release and resulted in increased root growth by improving root sucrose distribution. These results suggest that FAWD15 irrigation can mitigate the effect of low P usage on rice grain yield by increasing soil P release and root growth in paddy fields.

中文翻译：

在为期4年的田间试验中，频繁的交替湿润和干燥灌溉通过增加土壤磷的释放和水稻根系的生长，缓解了低磷对水稻籽粒产量的影响。

不可再生的养分磷（P）在土壤中的迁移率低，并且通常以农作物无法获得的形式存在。干湿交替灌溉是广泛推广的节水灌溉技术之一，可以增加矿质养分的利用率。然而，它与稻田中磷的相互作用尚不清楚。我们进行了为期4年的田间试验，以确定频繁交替湿润和干燥（FAWD15）灌溉和低磷使用（P45）的特定制度是否对水稻产量，水稻生长，水分利用效率（WUE）和农艺磷具有协同作用使用效率（AEp）和土壤残留肥料P。我们发现，与连续淹水（CF）灌溉相比，FAWD15灌溉在一项为期4年的田间试验中，在低磷使用条件下维持水稻产量。我们的结果还表明，在低磷用量下，FAWD15导致较高的AEp和WUE，并减少了残留肥料P。此外，FAWD15灌溉增加了不稳定磷的释放，并通过改善根蔗糖分布而增加了根的生长。这些结果表明，FAWD15灌溉可通过增加稻田土壤磷的释放和根系的生长来减轻低磷对水稻籽粒产量的影响。

更新日期：2020-04-21

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