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“水稻一蔬菜”轮作是近年来出现的一种新的种植模式,可防治大棚的土壤次生盐渍化。然而,菜后水稻种植以倒伏为主的灾害极其突出,导致水稻产量偏低、品质变差,种稻效益不高。一、倒伏原因1.秧苗素质差。由于育秧期间气温高、湿度大,造成秧苗徒长,秧苗过高,苗弱、苗嫩、分蘖少或不分蘖、根系不发达,加之在拔秧、运输过程中造成的损伤,移栽大田后返青和分蘖发生慢,若管理不当,后期生长过旺而造成倒伏。2.氮肥过重。受前作施肥水平及
“Rice a vegetable ” rotation is a new cropping pattern appeared in recent years, which can prevent soil secondary salinization in the greenhouse. However, the disaster of lodging-oriented rice cultivation is extremely prominent after the vegetable cultivation, resulting in the low yield of rice and the poor quality of rice cultivation. First, the reasons for lodging 1. Poor quality seedlings. Due to the high temperature during the seedling raising, the humidity is big, the seedlings are long, the seedlings are too tall, the seedling is weak, the seedling is young, the seedling is tender, the tiller is less or no tillers, the root system is underdeveloped, combined with the damage caused by pulling seedlings and transportation, And tiller occurs slowly, if not properly managed, post-growth over-caused by lodging. Nitrogen overweight. By fertilization before and for the level