Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China.
School of Life Sciences and State Key Laboratory of Agrobiotechnology , The Chinese University of Hong Kong , Shatin , Hong Kong 999077 , China.
J Agric Food Chem. 2019 Sep 25;67(38):10577-10586. doi: 10.1021/acs.jafc.9b03124. Epub 2019 Sep 17.
Root and rhizosphere is important for phosphorus (P) uptake in rice plants. However, little is known about the detailed regulation of irrigation regimes, especially frequently alternate wetting and drying (FAWD), on P usage of rice plants. Here, we found that compared with normal water and P dose, FAWD with a reduced P dose maintained the grain yield in two rice varieties. Compared to rice variety Gaoshan1, rice variety WufengyouT025 displayed a higher grain yield, shoot P content, rhizosphere acid phosphatase activity, abundance of bacteria, and bacterial acid phosphatase gene of rhizosphere. Moreover, the FAWD regime may increase the abundance of bacteria with acid phosphatase activity to release available phosphorus in the rhizosphere, which is associated with rice varieties. Our results suggest that an optimized management of irrigation and phosphorous application can enhance both water and phosphorus use efficiency without sacrificing the yield, which may contribute significantly to sustainable agriculture production.
根和根际对于水稻植物吸收磷（P）很重要。然而，人们对灌溉制度的详细调节，特别是频繁的干湿交替（FAWD）对水稻植物 P 利用的影响知之甚少。在这里，我们发现与正常水和 P 剂量相比，FAWD 减少 P 剂量维持了两个水稻品种的籽粒产量。与水稻品种高山 1 号相比，水稻品种五峰油 025 表现出更高的籽粒产量、地上部 P 含量、根际酸性磷酸酶活性、根际细菌丰度和根际细菌酸性磷酸酶基因。此外，FAWD 处理可能会增加具有酸性磷酸酶活性的细菌的丰度，从而释放根际中的有效磷，这与水稻品种有关。我们的结果表明，优化灌溉和磷素管理可以在不牺牲产量的情况下提高水和磷素的利用效率，这可能对可持续农业生产做出重大贡献。
