High-yield cultivation method for increasing grains per spike and grain weight of winter wheat and making winter wheat ripen in advance

Abstract

The invention discloses a cultivation method for increasing grains per spike and the grain weight of winter wheat and making the winter wheat ripen in advance. The cultivation method is especially suitable for superhigh-yield cultivation of the winter wheat in regions where wheat and corns are insufficient in heat quantity for double cropping. The cultivation method mainly includes the following steps that (1) a shed frame of which the height ranges from 20cm to 25cm is built, after the winter wheat is vernalized, three layers of plastic films cover a wheat field in late January, and temperature rises to make the winter wheat revive as soon as possible; (2) after air temperature rises, the number of layers of covered films is reduced to make the temperature under the films stable, and the first layer is removed in mid-to-late February; (3) the second layer is removed at the beginning of March; (4) the two opposite shed walls are uncovered in the mid-to-late March for ventilation, and cold resistance exercise time ranges from 5 days to 7 days; (5) at the end of March and the beginning of April, the third layer of pore films is removed when jointing is conducted on the wheat in the shed. The number of spikelets is increased by covering the plastic films to prolong time from reviving to jointing, temperature is relatively low after the films are removed, the wheat grows slower after jointing, and floret degeneration number is reduced; flowering is conducted in advance, the ripening rate is improved, grain filling time is prolonged, then, the wheat ripens in advance, and the grain weight is increased by avoiding dry and hot wind.

Description

technical field [0001] The invention relates to a new crop planting method, which is especially suitable for super-high-yield cultivation of winter wheat under the condition of two-cropping winter wheat-summer corn in the northern part of the North China Plain and the accumulated temperature is extremely tense, and can also be applied to the balance of winter wheat and summer corn crops Increase production. Background technique [0002] (1) The accumulated temperature of winter wheat-summer corn double-cropping production in the northern part of the North China Plain is seriously insufficient [0003] Double cropping of winter wheat and summer maize is the main cropping system in North China Plain. The heat resources in the North China Plain decrease from south to north, and the accumulated temperature drops from 5,200°C in Xinyang in southern Henan Province to 4,200°C in Baoding in central Hebei Province. The northern part of the North China Plain is controlled alternatel...

AI Technical Summary

Problems solved by technology

[0008] So far, there has been no breakthrough in the new method of increasing the grain number and grain weight of winter wheat by reasonably increasing the accumulated temperature in the wheat field, delaying the ear development process of winter wheat, and effectively prolonging the effective growth period of the crop.