绿肥的育种工作是薄弱环节,就种植面积最大的紫云英、草木樨,苕子等而言,各地引种多年,缺乏良种更新,生产上表现了品种混杂,种性退化,草、种产量都不高,对绿肥生产造成莫大损失。为此,迅速选育出一批新的良种,以适应农业现代化需要,实为当务之急。本文仅就苕子的杂交育种技术简介如下:苕子杂交育种,可在选种圃内 Breeding of green manure is the weakest link. In terms of the largest planting area of ​​Chinese milk vetch, herbaceous mulberry, razor clam, etc., it has been introduced for many years in various places, lacking the breeding of elite varieties. The production shows mixed varieties, degenerated species, Not high, causing great loss of green manure production. To this end, the rapid breeding of a new batch of seed to meet the needs of agricultural modernization, it is imperative. This article only on the son of hybrid breeding technology briefings are as follows: raccoon cross breeding, in the selection of nurseries