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油菜前作大多是中、晚稻。水稻收获后,翻耕晒垡,整地移栽。但是有些生产队油菜面积大,季节紧,劳力、畜力紧张,为了抢季节,烂种烂栽。由于土壤潜层水过多,土温低,氧气不足,造成不发,死苗缺株严重。一、烂栽油菜不发的原因首先,我们这里油菜栽植期一般在10月下旬到11月上旬,这时的气温正逐渐下降,平均气温在13.6—11.7℃。移栽油菜活棵后,土温要求不低于10℃,当土温降到3℃以下时,油菜进入越冬期。因此土壤温度的高低,对越冬前油菜的生长快慢影响极大。土壤温度的升降决定于土壤的热容量(即1
Most of the rapeseed is in the late rice. After harvesting rice, tillage drying, land preparation and transplanting. However, some production rapeseed area, tight season, labor, animal power tensions, in order to grab the season, rotten bad planted. As a result of too much water in the soil, low soil temperature, lack of oxygen, resulting in no fat, dead shortage of seedlings serious. First, rotten planted rape is not the reason First of all, here we rape planting generally in late October to early November, when the temperature is gradually declining, the average temperature at 13.6-11.7 ℃. After transplanting rapeseed trees, soil temperature requirements of not less than 10 ℃, when the soil temperature dropped below 3 ℃, rape into winter. Therefore, the level of soil temperature, the growth of rape before winter has a great impact on the growth rate. Soil temperature rise and fall depends on the soil heat capacity (ie 1