摘要
1981年至1987年,对稻田不同多熟种植方式进行了定位观察。结果表明:(1)随技术的进步,本区水热状况较好的稻田种植双季稻亩产可过“双纲”,种植麦稻稻亩产可过“吨粮”;(2)稻田进行多熟种植,把土壤与作物间的物质循环提到较高的水平。只有增加投入,才能维持地力及提高产出;(3)随复种指数的提高,作物从土壤中取走的钾素剧增,秸秆还田及施有机肥归还土壤钾素效果明显。
During 1981-1987, the fixed position observation was conducted in different patterns of multiple cropping system of paddy fields. The results showed as follows;
1. Following the technical improvement, the yield of double cropping rice was over 12 ton/ha, and wheat-rice-rice was over 15 ton/ha, in those fields with better water and heat conditions in the region.
2. The different patterns of multiple cropping system of paddy fields has took the material cycle between soil and plants to a higher level. Only by increasing investment could you raise the output value.
3. Following the increase of multiple crop index, a sharp increase in K were assimilated from soil by plants. There was a significant result for reverting K in soil by returning straw and applying organic fertilizer or manure to fields.
出处
《西南农业学报》
CSCD
1989年第2期32-37,共6页
Southwest China Journal of Agricultural Sciences
关键词
稻田
耕作制度
定位
种植方式
土壤
Cropping system
Paddy field cropping system
Fixed position observation
Downland region in the south of Sichuan
