桑树种植对土壤理化性质的改良效应

Improvement Effect of Mulberry Planting on Soil Physical and Chemical Properties

为探讨桑树种植对齐齐哈尔市甘南县砂质暗棕壤的改良效果,通过实地种植与种苗培育观察并记录4种桑树各生长阶段的日期与特点,从而对这4种桑树在齐齐哈尔市甘南县的适应性进行评价。结果表明,4种外来桑种的幼树对甘南县的适应性由高到低为育71-1、海桑、沈大1号和沈大2号,这4种桑树各阶段的实际生长日期均晚于其原产地的生长日期;在甘南县典型的砂质暗棕壤条件下3种桑树种苗(沈大1号、沈大2号和海桑)的培育成活率由高到低为海桑、沈大2号和沈大1号,其三者的落叶对土壤的理化性质均产生影响,种植4种桑树后土壤的多种有机质含量均增加,从而达到了改良土壤的效果。

In order to explore the improvement effect of mulberry planting on sandy dark brown soil in Gannan County,Qiqihar City,the date and characteristics of each growth stage of four mulberry species were observed and recorded through field planting and seedling cultivation experiments,so as to analyze and evaluate the adaptability of these four mulberry species in Gannan County,Qiqihar City.The results showed that the saplings adaptability of the four alien mulberry species was 71-1,Haisang,Shenda 1 and Shenda 2 from high to low in Gannan County.In typical sandy dark brown soil area of Gannan County,the survival rate of three kinds of mulberry seedlings from high to low was Haisang,Shenda 2 and Shenda 1,and their fallen leaves had influences on soil physical and chemical properties.After four kinds of mulberry planting,soil organic matter content were increased,so as to achieve the effect of soil improvement.