紫云英又名红花草,为我国南方稻区主要的冬季绿肥,紫云英用作早稻基肥时,其养分释放分解受压青期、压青量、压青深度及配施石灰等因素影响很大,主要技术关键如下: 1、压青期①压青期应以插秧期而定,一般宜在插秧前10—15天左右。因为紫云英压青后,铵态氮肥释放强度的高峰是在压青后两个星期开始的,一个月左右积累达到最高峰,这样紫云英翻压后的养分正好与早稻生育期需肥相吻合,有利于满足插秧后就能得 Astragalus, also known as safflower grass, is the main winter green manure in the rice growing areas in southern China. When Asparagus officinalis is used as a base fertilizer for early rice, its nutrient release and decomposition pressure green period, the amount of green pressure, the depth of pressing green and the lime application Large, the main technical key are as follows: 1, the pressure of blue ① pressure should be inserted during the period of planting, generally should be about 10-15 days before transplanting. Because the purple cloud of green pressure after the release of ammonium nitrogen fertilizer peak intensity in the two weeks after the start of the pressure, a month or so reached the peak accumulation, so Ziwenying turn right pressure and early rice growth period of fertilizer Match, is conducive to meet the seedlings can get