A kind of cultivation method of machine-transplanted hybrid rice with reduced holes, stable seedlings and large spikes

Abstract

The invention discloses a machine-transplanted hybrid rice hill-reduction seedling-stabilizing large-ear culturing method. The machine-transplanted line spacing of hybrid rice is 0.30 m, and the hill spacing is adjusted to be 0.20 m to 0.25 m; the seedling grabbing area is set according to the seedling establishment percentage, and during transplanting, the number of seedlings in each hill is 3 to 5 on average so that it can be guaranteed that the number of survival seedlings in each hill is 2 to 4 after regeneration, the density is 132000 hills per hm<2> to 167000 hills per hm<2>, the average total seedling number is 240 pieces per hm<2> to 300 pieces per hm<2>; in other words, the weight of seeds per hm<2> is kept being 18 kg to 22.5 kg. According to the machine-transplanted hybrid rice hill-reduction seedling-stabilizing large-ear culturing method, the number of transplanting hills is reduced by 25.8% to 41% compared with conventional transplanting, and transplanting efficiency is greatly improved; as the number of hills is decreased without decreasing the number of seedlings, the number of seedlings in each hill is increased, the transplanting missing rate is reduced by 10 percent or above, and the number of persons for seedling supplementing is decreased by 3 to 4 per hm<2>; the machine-transplanted late-planting and late-harvesting area of multi-cropping rice fields in Sichuan is large, and rainwater after autumn is much; when the number of hills is decreased, ventilation and light transmitting become better, pest and disease damage is reduced, lodging is reduced, and large ears, more grains and high yield are achieved.

Description

technical field [0001] The invention belongs to the technical field of rice planting, and in particular relates to a cultivation method for machine-transplanted hybrid rice with reduced holes, stable seedlings, stable seedlings and large spikes. Background technique [0002] Rice is the main food crop in China and plays a pivotal role in my country's food security. In the case of a sharp decline in the rural labor force, the mechanized rice planting area is gradually increasing. By 2013, the national rice mechanical planting level and machine harvesting level had reached 36.1% and 80.9% respectively. Sichuan is a major rice producing province, and it is an inevitable trend to comprehensively promote the mechanization of rice production. To ensure food security, the stable and high yield of rice mechanization is particularly important. The size of rice planting plays a key role in the formation of rice population structure in the later stage, thus affecting the formation of ...

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Problems solved by technology

[0004] The object of the present invention is to provide a method for cultivating machine-transplanted hybrid rice with reduced holes, stable seedlings, and large spikes, aiming to solve the problems of machine-transplanted hybrid rice with many missed transplants, low planting efficiency, time-consuming and labor-intensive replacement of seedlings, serious pests and diseases in the late stage of large-scale production, The problem of low output and unstable output

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