我省蚕区大多分布在丘陵山区,桑园土壤肥力较弱。桑园间作绿肥进行绿肥埋青,是改良桑园土壤,提高土壤肥力的重要措施。现将桑园栽培绿肥技术要点介绍如下: 一、选用良种。绿肥作物有豆科、十字花科、禾本科三大类,桑园间作绿肥以豆科绿肥作物为好。分冬季绿肥和夏季绿肥两类。冬季绿肥一般选用紫云英、胡豆、苕子、豌豆等,夏季绿肥选用绿豆,田菁、豇豆等。二、适时早播。适时早播,可使冬季绿肥苗全苗壮,安全越冬;夏季绿肥充分利用下伐后一段时间内的日照,加快生长达到高产。冬季绿肥紫云英、苕子等9月中旬播种,夏季绿肥4月下旬至5月初播种。三、合理的播种量。应根据不同绿肥种类、种子 Silkworm areas in our province are mostly distributed in hilly areas, mulberry soil fertility is weak. Mulberry intercropping green manure as green manure, is to improve the mulberry soil, an important measure to improve soil fertility. Now mulberry cultivation of green manure techniques are as follows: First, the selection of elite. Green manure crops are legumes, cruciferae, three categories of grass, mulberry intercropping green manure legumes green manure as well. Winter green manure and summer green manure two categories. Winter green manure commonly used vetiver, walnut, razor clam, peas, green mung bean selection in summer, Sesbania, cowpea and so on. Second, timely early broadcast. Timely sowing, winter green manure seedlings can Zhuang Zhuang, safe wintering; green manure make full use of summer sunshine after a period of time down to accelerate the growth to high yield. Winter green fat vetiver, prickly heat and other sowing in mid-September, summer green manure from late April to early May sowing. Third, a reasonable amount of seeding. Should be based on different types of green manure, seeds