Canopy regulation and control method for improving mechanical kernel harvesting quality and kernel commodity quality of corns

Abstract

The invention discloses a canopy regulation and control method for improving the mechanical kernel harvesting quality and the kernel commodity quality of corns in a cold region. The method is any oneof the following A1) to A4), specifically, A1) cutting for 1-2 sections is carried out on the 29th-35th day after the corns silk; A2) cutting for 3-4 sections is carried out on the 36th-42th day afterthe corns silk; A3) cutting for 4-6 sections is carried out on the 43th-49th day after the corns silk; and A4) cutting for 5-6 sections is carried out on the 50th-53th day after the corns silk. According to the method, by setting different stem and leaf cutting periods and parts and researching influences of different canopy regulation and control measures on corn seed grain grouting, dehydrationcharacteristics, yield quality and mechanical grain yield quality, an optimal canopy dynamic regulation and control operation scheme is finally obtained, reduction of the lodging and folding rate andthe seed kernel moisture content is obviously promoted on the premise of ensuring stable yield, the mechanical harvesting quality and efficiency of corn kernels are improved, and the commodity quality of the corn kernels is improved.

Description

Technical field[0001]The invention belongs to the technical field of agricultural planting, and specifically relates to a canopy control method for improving the quality of corn mechanical grain harvest and the quality of grain commodities.Background technique[0002]Worldwide, the total output of corn and the output per unit area have steadily ranked first among food crops, which is of great significance in ensuring global food security. As the world’s second largest corn producer and consumer, China’s total corn output accounts for more than 20% of the global corn output. The main product is corn for kernels. 10% of its total output is used for rations, 68% for feed, and 20%. Used as raw material for industrial processing. Mechanical corn harvesting is the development direction of my country's mechanized corn harvesting and the focus of corn production. The high crushing rate during harvesting is the main quality problem of my country's corn mechanical harvesting. Kernel moisture co...

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Problems solved by technology

[0004] At present, the commonly used corn dehydration technologies in production are mainly de-topping, peeling and drying, and swathing. Among them, the de-topping dehydration technology is judged based on the wax ripening period. On the one hand, with the continuous increase of corn planting density, it has become difficult. In the context of global climate change, the frequent occurrence of unfavorable weather such as rainy, less sunlight, high temperature, and strong winds during the grouting period leads to the reduction of group ventilation and light transmission, the imbalance of source-sink relationship, and the increased risk of mildew and lodging. Obstacles to high yield and high efficiency; On the other hand, it is difficult for growers to accurately judge the maturity period of corn wax, it is difficult to implement precise technology, and the stability of operation effect is poor, often missing the best key time point of technical operation

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