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草业学报  2015 

自制环保型土壤改良剂对一年生黑麦草生长的作用

DOI: 10.11686/cyxb2014503, PP. 206-213

Keywords: 环保型土壤改良剂,土壤容重,黑麦草,分蘖,生物量

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Abstract:

为探索自制环保型土壤改良剂应用于黄土高原半干旱区后对土壤的改良效果,选用一年生黑麦草进行盆栽试验,统计分析一年生黑麦草生长生理指标,比较3种自制土壤改良剂(A,B,C)和1种市场土壤改良剂(D)的作用效果,以筛选出适宜的土壤改良剂。研究结果表明,土壤改良剂能改善土壤的通透性,对一年生黑麦草出苗率影响不大;添加土壤改良剂能显著提高一年生黑麦草的株高、分蘖数、生物量、含水率、P肥和N肥表观利用率;与市场改良剂和对照CK相比,添加自制环保型土壤改良剂C的处理,其植株株高分别提高了16.6%和33.7%,分蘖数提高了18.5%和33.8%,生物量提高了40%和185%,土壤改良剂C作用下P肥表观利用率达到10.28%,说明自制环保型土壤改良剂C的促进作用最佳。研究结果将为黄土半干旱区土壤改良剂的研发以及植被恢复提供理论指导作用。

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