Yang Guotao, Liu Rong, Ma Peng, Chen Hong, Zhang Rongping, Wang Xuechun, Li Yongyan, Hu Yungao
College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
Radiology Department, Mianyang Central Hospital, Mianyang 621000, China.
Plants (Basel). 2022 Sep 2;11(17):2306. doi: 10.3390/plants11172306.
(1) Background: Sheath blight is one of the most economically significant rice diseases worldwide. A study was conducted in order to find the relationship and impact of the amount of nitrogen (N) and phosphorus (P) application on the hybrid rice population microclimate and the severity of sheath blight. (2) Methods: Four N and four P application levels were used to determine their impact on plant type, temperature, and humidity variation in different positions of population and the severity of sheath blight in the later stage. (3) Results: We found that N and P application levels could affect the plant type and change the population temperature and humidity by increasing the leaf length and leaf angle. (4) Conclusions: N application had a more significant (p < 0.05) impact on the plant type. High N application caused decreased temperature (hybrid rice population), while increased humidity (especially the population base layer at grain filling stage) resulted in severe sheath blight. High P application had similar impacts; however, P application increased material and nitrogen transport in plants and reduced the severity of sheath blight.
（1）背景：纹枯病是全球最具经济重要性的水稻病害之一。开展了一项研究，以探究氮（N）和磷（P）施用量与杂交稻群体小气候及纹枯病严重程度之间的关系和影响。（2）方法：采用4个氮素和4个磷素施用水平，来确定它们对植株形态、群体不同部位的温度和湿度变化以及后期纹枯病严重程度的影响。（3）结果：我们发现，氮和磷的施用水平会影响植株形态，并通过增加叶长和叶角来改变群体温度和湿度。（4）结论：氮肥施用对植株形态的影响更为显著（p < 0.05）。高氮肥施用导致温度降低（杂交稻群体），而湿度增加（尤其是灌浆期群体基部）会导致纹枯病严重发生。高磷肥施用有类似影响；然而，磷肥施用增加了植物体内物质和氮素的转运，并降低了纹枯病的严重程度。
