自制环保型土壤改良剂对一年生黑麦草生长的作用

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。

Effect of soil conditioner on the growth of Lolium multiflorum

To explore the effect of soil conditioners which are applied to semiarid regions of the Loess Plateau, this study compared pots planted with Lolium multiflorum seed with and without the soil conditioners.Three self-made soil conditioners (A,B,C)and a standard soil conditioner (D)were compared.The results showed that soil conditioner application can significantly improve soil perviousness,but there was no difference in seed-ling emergence rates between untreated and soil conditioner treated pots.Soil conditioner C produced signifi-cantly better height growth in L.multiflorum plants,16.6% and 33.7% higher than that of the standard soil conditioner and the untreated soil respectively.Tiller numbers in pots treated with soil conditioner C were 18.5% and 33.8% higher than that of standard soil conditioner and the untreated soil respectively while the bi-omass was 40% and 185% higher,respectively.The appearance utilization rate of phosphorus was 10.28%treated with soil conditioner C.Therefore,self-made environment-friendly soil conditioner C was the best soil conditioner among them.The study will provide a theoretical guide for soil conditioner application and vegeta-tion restoration in semiarid regions of the Loess Plateau.