The Effects of Water and Fertilizer Coupling on Plant and Soil Nitrogen Characteristics and Fruit Growth of Rabbiteye Blueberry Plants in a Semi-Arid Region in China  

作　　者：Xiaolan Guo Di Zhao Jinbin Hu Delu Wang Jianbin Wang Muhammad Shakeel 

机构地区：[1]College of Life Sciences,Huizhou University,Huizhou,516007,China [2]College of Forestry,Guizhou University,Huaxi,550025,China [3]School of Architecture and Civil Engineering,Huizhou University,Huizhou,516007,China [4]Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions,Institute of Entomology,Guizhou University,Guiyang,550025,China

出　　处：《Phyton-International Journal of Experimental Botany》2023年第1期209-223,共15页国际实验植物学杂志（英文）

基　　金：funded by the National Natural Science Foundation of China(NSFC 31260192);the Major Projects in Guizhou Province(SY[2015]6032-2)。

摘　　要：To evaluate the effects of nitrogen(N)and irrigation coupling on the soil N distribution,plant N utilization,and fruit yield of rabbiteye blueberries(Vaccinium virgatum),a field experiment was designed using two factors(water and fertilizer application)with four levels of irrigation and three levels of fertilization,and a control.Under the different water and fertilizer combinations,N primarily accumulated in the leaves.Irrigation and N application within appropriate ranges(pure N≤29 g/plant and irrigation volume≤2.5 L/plant)significantly improved the blueberry fruit yield.Increases in water and N within these ranges promoted the effective accumulation of N in various organs and the absorption and utilization of N in the plants,which ultimately promoted blueberry yield.With increased N application rate,the nitrate N content of the 0–20 cm and 20–50 cm soil layers increased.With increased irrigation volume,the nitrate N content of the 0–20 cm soil layer decreased,while the nitrate content in the 20–50 cm soil layer increased.Low N and moderate water treatments resulted in high fruit yields and reduced nitrate N retention in the soil.Under these conditions,the economic input-output ratio was high and the soil N accumulation was low,and thus the economic and ecological benefits were maximized.

关 键 词：Vaccinium virgatum soil nitrogen distribution plant nitrogen utilization fruit yield 

分 类 号：S663.9[农业科学—果树学]