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在典型的草原草原中,应用以不稳定和适度封闭的分数保持,并添加多种营养素

Lingyu Shao¹, Yang Peng², Heyong Liu³

¹State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Erguna Forest-Steppe Ecotone Ecosystem Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.

Journal of environmental management

|August 17, 2023

概括

在干旱草原中应用的 (P) 很容易被植物吸收,多余的P留在不稳定的土壤部分中. 这表明无机肥可以有效地恢复具有低吸附能力的退化草原.

科学领域:

土壤科学土壤科学
生态生态学生态生态学
农业学是一种农业学.

背景情况:

(P) 是全球干旱地区的关键限制营养素,仅次于 (N).
研究主要集中在循环上,对自然条件下的动态或草原中的无机P受精的理解有限.
了解P命运对于管理受长期放牧和收割干草影响的草地至关重要.

研究的目的:

研究草原土壤生态系统中应用无机的命运.
为了确定不同的土壤分数如何响应营养添加.
评估无机肥作为退化草原的管理策略的潜力.

主要方法:

一个为期3年的实地实验是在典型的草原草中进行的.
多种营养元素,包括,被添加到土壤中.
分析了土壤样本的各种无机和有机分数,并测量了植物的P吸收量.

主要成果:

添加营养素显著增加了可变无机P (实验室P_i) 和适度封闭的无机P (Mod-P_i) 度,但没有恢复性无机P (Rec-P_i).
总无机P度只有当P和N一起应用时才会增加.
应用的P和N显著增强了地面植物的P吸收,而不会影响土壤有机或微生物的P池.

结论:

在这些草原中应用的无机P主要被植物吸收或留在不稳定的土壤部分中,表明P吸附能力较低.
研究结果表明,无机肥是一种可行的策略,可以解决缺乏问题,并改善退化草原的生育能力.
这种方法可能有利于管理受密集牧场或料收获影响的草原.

关键词:

内蒙古高原是一个高原.草地草原的草原,是草原的草原.多种营养素多种营养素的循环循环活动土壤分数土壤分数

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