桑树及桑枝生物炭对风沙土改良

Improvement of windy sandy soil by mulberry tree and mulberry branch biochar

选择辽西北风沙土作为研究对象,通过盆栽实验种植桑树以及施加不同浓度的生物炭改良风沙土.结果表明,桑树单独种植会减小风沙土pH,在风沙土中添加生物炭会增加土壤pH,随着实验时间变长,桑树种植可平衡生物炭对风沙土pH的增加作用;桑树单独种植及添加生物炭处理都能有效增加风沙土有机质、CEC、全氮、全磷,其在种植6个月土壤中的含量明显高于种植3个月土壤中的含量,桑树及桑枝生物炭对风沙土改良具有明显的效果.

The aeolian sandy soil of Northwest Liaoning Province is selected as the research object,mulberry trees were planted in pots and biochar was applied at different concentrations to improve the wind-sand soil.And the results showed that the pH of wind-sand soil was reduced by mulberry trees alone and increased by adding biochar to the wind-sand soil.Both mulberry trees planted alone and treated with biochar effectively increased organic matter,CEC,total nitrogen,and total phosphorus in wind-sand soil,and the soil content was significantly higher in six months of planting than in three months of planting.Mulberry trees and mulberry branch biochar had obvious effects on wind-sand soil improvement.