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为了开辟生物钾源,本所曾于最近几年从引种和本地区的37种常见的栽培绿肥和野生绿肥中,经过化验分析和试种观察鉴定出小葵子为富钾绿肥,并进行了较大面积的多点试验示范,收到较好的效果,现简介如下: 一、特征特性小葵子(Helianthus debilis Nutt)是菊科一年生直立性草本植物。主根比较短,长在表土层10—15厘米深度以内,而须根发达粗壮,每株有45—75条,大多数分布在表土层8—18厘米深度之中,
In order to open up the bio-potash source, we have identified, in recent years, 37 cultivars of green manure and wild manure from the region and through laboratory analysis and seed-trial observation. A large area of multi-point demonstration, received good results, are summarized as follows: First, the characteristics of the characteristics of small sunflower (Helianthus debilis Nutt) is a year-old Asteraceae Compositae plants. The main root is relatively short, grows in the topsoil within 10-15 cm depth, and fibrous roots developed robust, each plant has 45-75, most of the distribution in the topsoil 8-18 cm depth,