水稻现有栽培法的缺点是:用水量大,往往因缺水不能按时栽插;受水田限制,很难扩大水稻栽种面积,旱改水要费很多人力物力;密度大不利于通风透光;病虫害多;肥料利用率低,而且费工,同时易受低温、杂草等多种不利因素影响,产量不稳,很难提高。 The shortcomings of the existing cultivation method of rice is: large amount of water, often due to lack of water can not be planted on time; limited by the paddy field, it is difficult to expand the area planted with rice, drought water costs a lot of manpower and resources; density is not conducive to ventilation and light; Pests and diseases and more; fertilizer utilization rate is low, but also labor, and vulnerable to low temperature, weeds and other adverse factors, the output is unstable, it is difficult to improve.