夏玉米密植滴灌水肥一体化生产技术OA

This paper systematically summarized the key technical points of dense planting and drip irrigation with integrated water and fertilizer for summer maize,covering the entire growth cycle.During the pre-sowing preparation stage,flat and well-drained fields were selected,and fine straw incorporation combined with periodic deep tillage or subsoiling were implemented.Fertilization was applied based on soil fertility,and dense-planting-resistant,machine-harvestable coated varieties(such as Nongda 778 and Dedan 123)were preferentially selected,with a rational planting density of 5 000–6 000 plants/667 m².A drip irrigation system comprising a head control unit and a three-level pipeline network was established,with pressure-compensating drip tapes being the preferred choice.In the sowing operation,methods such as guided precision sowing,stubble-direct seeding,or triangular seedling-fixing sowing were adopted to ensure sowing quality.The sowing time was determined according to the planting pattern,and simultaneous operations of sowing,fertilization,and drip tape laying were achieved.Field management focused on fertigation as the core,with irrigation and split nitrogen applications carried out based on soil moisture monitoring at different growth stages.Complementary practices,including seedling thinning and final spacing,chemical weeding,growth regulation,and integrated disease and pest control,were implemented.During the harvest and storage stage,maize was harvested using combine harvesters at the appropriate delayed time when the husks turned yellow,the kernel milk line disappeared,and the moisture content dropped below 25%.The grains were then dried to a moisture content below 13%before storage.The drip irrigation system was regularly inspected and maintained,and related equipment was recycled after harvest.This paper provides a reference for the green and sustainable production of summer maize.