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利用南方光、热、水优厚的自然条件,扩大复种指数,是提高产量的重要途径。双季稻三熟制对土壤肥力的影响,越来越被人们所重视,是南方双季稻丘陵地区急待解决的问题。本试验就油莱、双季稻三熟制增产效果,经济效益和对土壤肥力的影响进行研究。简报如下: 一、试验方法 试验在本所第四纪红色粘土红壤开垦种一年旱作物第一年改水田和改水田第四年低肥土壤上进行。 试验设:(一)中肥组,1.紫云英(连作)——双季稻(CK),2.油菜+油菜行中混播紫云英(连作)——双季稻,3.油菜(连作)——双季稻等三个处理(新垦红壤改田三年,小区面积0.1亩,重复二次);(二)低肥组,4.紫云英(连作)——双季稻(CK),
The use of southern light, heat, water, natural conditions, to expand the multiple cropping index is an important way to increase production. The effect of double cropping rice system on soil fertility has been paid more and more attention by people and it is an urgent problem to be solved in the double cropping rice hilly area in the south of China. In this study, the yield, economic benefit and soil fertility of oilleaf and double cropping rice were studied. The briefing is as follows: I. Test Method The experiment was carried out on the first year of paddy field reclamation and the fourth year of low paddy soil for paddy field reclamation in the red clay soil of Quaternary in Quaternary. The experimental setup was as follows: (1) Medium-fat group, 1) Chinese milk vetch (continuous cropping) - double cropped rice (CK), 2) (Continuous cropping) - double cropping rice and other three treatments (red soil reclamation for three years, area 0.1 acres, repeated twice); (2) low fertility group 4, (CK),