施氮方式对白杨树水氮吸收的影响

Effect of Nitrogen Application Mode on Water Nitrogen Absorption of Populus alba

摘要: 以吉林快杨为研究对象，通过3种施氮处理（N₁氮渗透灌溉、N₂分氮施用、N₃传统的一次性施氮）和3种灌水定额（T₁、T₂、T₃分别为100%ET、80%ET和60%ET），研究其对吉林快杨各器官（细根、粗根、中心干、多年枝、一年枝和叶片）总氮含量和土壤含水率的影响。结果显示，新吸收的氮主要分布在根系和叶片，有利于植株对氮的吸收和积累，采用的氮渗透灌溉处理、灌水定额为100%ET更适合作为吉林快杨施氮方式，该处理方式还可大幅度提高吉林快杨的灌溉水利用效率。

Abstract: The effects of three nitrogen application treatments and three irrigation quotas on the total nitrogen content and soil water content of the organs of Jilin Populus alba were studied. The results showed that the newly absorbed nitrogen was mainly distributed in the roots and leaves, which was conducive to the nitrogen absorption and accumulation of plants. The nitrogen infiltration irrigation treatment with 100% irrigation water quota ET was more suitable for nitrogen application in Jilin Populus alba, and this treatment method could also greatly improve the irrigation water utilization efficiency of Jilin Populus alba.