摘要
以新疆库尔勒市梨园6年树龄库尔勒香梨为试材,采用土钻分层取土的方法对香梨整个生育期的香梨园土壤取样,研究土壤无机氮含量及累积特征。结果表明:香梨园土壤中无机氮的分布具有表聚效应,不同层次土壤无机氮的含量都随着生育期的推进而呈现递减趋势。施用氮肥可以增加土壤中无机氮含量,且土壤中无机氮含量与氮肥施用量呈正比关系,会随着氮肥施用量的增加而增加。在香梨年生育末期,0~120cm土层土壤中硝态氮累积量达到15.1kg/hm^2,铵态氮累积量达到13.43kg/hm^2,无机氮的累积量共计28.53kg/hm^2。
Taking the 6-year-old Pyrus sinkiangensis as experimental material,the soil samples were collected by soil-drilling method in the whole growth period of Korla fragrant pear,and the soil inorganic nitrogen content and accumulation characteristics were studied. The results showed that the distributions of soil inorganic nitrogen had a surface aggregation effect in Korla fragrant pear orchards,and the contents of soil inorganic nitrogen in different layers showed a decreasing trend with the growth period developing. The application of nitrogen fertilizer could promote the contents of soil inorganic nitrogen significantly,and the contents of soil inorganic nitrogen was proportional to the application amount of nitrogen fertilizer,which would increase with the nitrogen application rate increasing. At the end of the annual growth period, the accumulation of nitrate nitrogen in the 0 ~ 120 cm soil layer reached 15. 1kg/hm^2,the accumulation of ammonium nitrogen reached 13. 43kg/hm^2,and the total accumulation of soil inorganic nitrogen was 28. 53kg/hm^2.
出处
《西部林业科学》
CAS
2017年第3期130-135,共6页
Journal of West China Forestry Science
基金
自治区高校科研计划科学研究重点项目(XJEDU2014I017)
国家自然科学基金(31460548)
土壤学自治区重点学科资助
关键词
库尔勒香梨
果园
土壤无机氮
累积量
Pyrus sinkiangensis
orchard
soil inorganic nitrogen
accumulation amount
