Cultivation technique for three high and one safe of double harvest rice

Abstract

The invention relates to a cultivation technique for three high and one safe of double harvest rice, comprising the following steps: before sowing, sprout cultivation fertilizer of the invention is used as basic fertilizer and spread at one time, the usage amount is 30-75g / m<2> seedling bed, early rice with 3-4 leaf age and late rice with 5-6 leaf age are transplanted to big field at proper time; a method of broad row spacing and narrow planting distance is adopted, the row spacing is 27-30cm, and the planting distance is 13-17cm; 12-14 kilograms of chemical nitrogenous fertilizer is spread on each mu in the planting, when the number of plant reaches 70%-90% of the planned spike number, drainage and field drying are carried out, then slight drying is carried out for three to four times, water is regained in the leaf sprouting period of the second leave from the top; rice tillering-control agent containing gibberellin is spread in the critical leaf age period of the effective tillering; and the agent is spread on the leaf surface in the crevasse period and in the milk time. The seedling-strengthening and premature-promoting technique of the invention, by utilizing rice sprout cultivation fertilizer for cultivating, simplifies the sprout cultivation procedure, and can prevent and treat plant diseases and insect pests in seedling bed, cultivate dumpy sprouts and promote the premature of big field.

Description

technical field [0001] The invention relates to rice cultivation technology. Background technique [0002] Ineffective tillers and empty grains of rice not only waste nutrients and do not contribute to the yield, but also affect the formation of yield, resulting in poor filling, which in turn affects rice quality. Low temperature in the early stage of double-cropping rice area is not conducive to early emergence, and high early temperature in late rice is prone to leggy seedlings, which is also not conducive to early emergence. However, the growth period and effective tillering period of double-cropping rice are short. In order to promote early emergence, production has to A large amount of chemical fertilizers will lead to a large number of ineffective tillers in the mid-term, which not only wastes a lot of nutrients due to the low tillering rate, but also is not conducive to the formation of large spikes, resulting in closed fields, deterioration of population conditions, ...

AI Technical Summary

Problems solved by technology

[0002] Ineffective tillers and empty grains of rice not only waste nutrients and do not contribute to yield, but also affect yield formation, resulting in poor filling, which in turn affects rice quality

Low temperature in the early stage of double-cropping rice area is not conducive to early emergence. High temperature in the early stage of late rice is prone to leggy seedlings, which is also not conducive to early emergence. However, the growth period and effective tillering period of double-cropping rice are short. In order to promote early emergence, production has to A large amount of chemical fertilizers will lead to a large number of ineffective tillers in the mid-term, which not only wastes a lot of nutrients with a low tillering rate, but also is not conducive to the formation of large spikes, resulting in closed canopy in the field, deterioration of group conditions, unfavorable ventilation and light transmission, decreased photosynthetic efficiency in the later stage, and easy Premature senility, decreased seed setting rate, poor grain filling, and poor rice quality