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Influence of drip irrigation, nitrogen fertigation, and precipitation on soil water and nitrogen distribution, tree seasonal growth and nitrogen uptake in young triploid poplar (Populus tomentosa) plantations

文献类型： 外文期刊

作者： He, Yuelin 1 ; Xi, Benye 1 ; Li, Guangde 2 ; Wang, Ye 1 ; Jia, Liming 1 ; Zhao, Dehai 4 ;

作者机构： 1.Beijing Forestry Univ, Minist Educ, Key Lab Silviculture & Conservat, Beijing 100083, Peoples R China

2.Open Univ China, Fac Agr Forestry & Med, Beijing 100039, Peoples R China

3.Beijing Acad Forestry & Pomol Sci, Beijing 100093, Peoples R China

4.Univ Georgia, Warnell Sch Forestry & Nat Resources, Athens, GA 30602 USA

关键词： Drip irrigation; N fertigation; Mineral nitrogen; Soil water content; N leaching; Poplar

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：4.516； 五年影响因子：5.12 ）

ISSN： 0378-3774

年卷期： 2021 年 243 卷

页码：

收录情况： SCI

摘要： The patterns of soil water and mineral nitrogen (Nmin) distribution, stand growth, and N uptake in a triploid Populus tomentosa plantation under two-year drip irrigation and N fertigation (DIF) treatments were investigated. There was a positive relationship between stand growth and the amount of precipitation and irrigation. Precipitation and irrigation affected the content of Nmin in top 0-20 cm soil layer after fertigation and the redistribution of Nmin in the soil. There was no significant difference in N uptake in poplar plantation among DIF treatments, and the high-fertigation in the rainy seasons didn't enhance stand growth. Thus, high-level irrigation with lower N fertigation was recommended in the study area. The long-term effects of fertigation on tree stand growth and Nmin distribution in deep soil layers and underground water remain to be studied further.

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