稻田油菜生长季节的气候和栽培条件十分复杂,高产稳产的障碍因素也较多,其中油菜移栽后部分出现烂根死苗是一个主要方面。近年来,笔者着重观察了油菜发生烂根的土壤、气候和栽培条件,初步找到了油菜移栽后烂根死苗的主要原因和有效的预防措施。 1.油菜栽后烂根死苗的原因 稻田土壤含水量过高是油菜移栽后烂根死苗的主要原因。土壤含水量这里是指土壤的绝对含水量、以100克干土中含多少水分。据观察和测定:油菜 Climatic conditions and cultivation conditions of rapeseed during the growing season are very complicated, and there are also more obstacles in the yield and stability of rapeseed. One of the main aspects is the emergence of dead shoots after rapeseed transplanting. In recent years, the author has observed the rape root rot soil, climate and cultivation conditions, initially found the rapeseed rotten root seedlings after the main reason and effective preventive measures. 1. rapeseed rotten root cause of dead seedlings Paddy soil moisture is too high after rapeseed rotted root causes of dead seedlings. Soil Moisture Here refers to the absolute soil moisture content, with 100 grams of dry soil contains much moisture. It is observed and measured: rape