浙江省河滩地为桑树发展的主要对象,桑树下滩在扩大栽桑面积方面有重要意义。河漫滩地土壤具有独特的分布规律和每年受到洪水影响与多变化的特点。各种类型的泛滥地土壤对桑树的生长反应差别很大,这方面前人研究得较少。本文企图通过浦阳江河谷地段的观察,找出一些土壤与桑树生长发育的关系,作为桑树下滩工作中的参考。概况浦阳江发源于旧浦江县(现属义乌县),向北流经诸暨、萧山注入钱塘江。上中游河谷较狭,土壤分布规律比较明显;大致在诸暨县城以北,河谷渐宽,河道多变,土壤分布比较复杂。解放以前,由于水利不修,每年春夏季 River beach in Zhejiang Province for the main object of the development of mulberry, mulberry beach in expanding mulberry area has important significance. Floodplain soils have unique distribution rules and are affected by the floods each year and have many changes. Various types of flooded soils have very different responses to the growth of mulberry trees. This paper attempts to find out some of the relationship between soil and mulberry growth and development through the observation of the Puyang River valley, as a reference in the work of mulberry tree. Overview Puyang River originated in the old Pujiang County (now Yiwu County), flows north through Zhuji, Xiaoshan into the Qiantang River. The upper middle reaches of the narrow valley, the distribution of soil is obvious; roughly in Zhuji County, north of the valley, widening, changing river, the soil distribution is more complicated. Before the liberation, due to water uninterrupted, spring and summer each year