Comprehensive prevention and control technology of corn waterlogging disaster

Abstract

The invention discloses a comprehensive prevention and control technology of a corn waterlogging disaster, wherein soil ridging or compartment ridging regulation and control are utilized. The comprehensive prevention and control technology comprises the following steps: sowing in a wide and narrow row spacing manner during corn sowing, carrying out intertillage ridging or ditching during the five-leaf stage of corn, ditching in wide rows of corn and ridging in narrow rods of corn, or ditching in wide rows on the two sides of a compartment consisting of four or six rows, additionally applying nitrogen-oxygen mixed fertilizer instantly after the corn waterlogging disaster occurs, and spraying spermidine chemical modifier on leaf surfaces at the same time, wherein spraying is carried out once in the morning and night for 2-3 days continuously; other steps are the same as that during normal management, corn is harvested until bracts of corn clusters are dried up, corn grain milk lines disappear, and a black layer appears, namely when grains are completely and physiologically matured. According to the comprehensive prevention and control technology, through comprehensive precontrol advantages of prevention in advance and remedy after the disaster, the root oxygen deficiency after waterlogging can be effectively reduced and retarded, accumulated toxic effect of hazardous substances of soil is reduced, and the root growth and absorption capacity is strengthened, so that the symplastic growth of overground part and root system is promoted, and the yield is improved.

Description

technical field [0001] The invention relates to a comprehensive prevention and control management technology for controlling corn waterlogging hazards through the organic combination of agronomy and chemical control, and belongs to the field of agronomy. Background technique [0002] With global climate change, waterlogging has become the second largest disaster in my country's agricultural natural disasters, accounting for about 24.2%, and the loss of crop yield caused by soil waterlogging hazards has become a global problem. According to statistics, about 10% of the world's arable land suffers from waterlogging disasters, resulting in a 20% reduction in crop yields, and about 50% of irrigated land is affected by poor drainage. Due to the regionality, suddenness and unpredictability of waterlogging disasters, the harm of waterlogging is greater than the threat of drought to agricultural production. Since the 1990s, the scope of flood disasters has expanded year by year and...

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Problems solved by technology

Although the selection of varieties can reduce losses to a certain extent, it is often impossible to prevent them in advance or effectively reduce the degree of disasters after the occurrence. Although previous studies have shown that increasing N fertilizer can reduce waterlogging damage at seedling stage and significantly improve growth, it can only be intervened after disasters and The mitigation effect is very limited, so how to take measures to prevent and mitigate waterlogging in advance, and how to adopt comprehensive technologies such as soil and chemical regulation to resist and prevent corn waterlogging disasters and reduce yield loss are crucial, but these series of problems Systematic research is lacking

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