Method for relay intercropping silage corn in single-culture alfalfa field in summer

Abstract

The invention provides a method for relay intercropping a silage corn in a single-culture alfalfa field in summer. The method comprises the following steps: A. sowing the alfalfa in lines; B. cradling the alfalfa and performing field management: the cradling action for the second time is performed on the premise of irrigation five days before or that the soil moisture content after rain is appropriate; C. interplanting the corn, in the same day when the alfalfa is cradled for the second time, sowing the corn directly; D. managing the corn: dressing 60 kg of ammonium bicarbonate or 25 kg of urea per mu for the corn in the bell stage, and immediately watering or applying during raining; E. cradling the alfalfa: in the corn growth period, not cradling the alfalfa; F. harvesting the corn: using a cornstalk silage harvester to remove stubbles and harvest the alfalfa, and mixing the corn and the alfalfa to be ensiled. The method makes full use of time and space difference between the alfalfa and the corn in the growth process, takes full advantage of the land source, and completely uses the water resource and photo-thermal resource from July to September, to improve the comprehensive grass yield, make up insufficient yield of the alfalfa in summer, and also solves the problem that the alfalfa is difficult to harvest in the rainy season.

Description

technical field [0001] The invention relates to a summer intercropping silage corn planting method in a single alfalfa field, which is especially suitable for alfalfa production in the Huanghuaihai Plain, and belongs to the technical field of forage grass intercropping. Background technique [0002] Alfalfa (Medicago sativa L.), referred to as alfalfa for short, is the leguminous forage with the longest cultivation history and the most extensive area in the world. Alfalfa is a cool and drought-loving crop with an optimum growth temperature of 20-25°C and poor heat resistance. In temperate regions, the growth of alfalfa in summer shows a relatively "dormant" state, resulting in a significant drop in grass production. The first-second stubble grass production accounts for more than 60% of the annual production. At the same time, the alfalfa field is wet in the rainy season, making it difficult to harvest mechanized. And silage and drying are more difficult. The rainy season ...

AI Technical Summary

Problems solved by technology

Alfalfa is a crop that likes to be cool and dry, and its optimum growth temperature is 20-25°C, and its heat resistance is poor.

In temperate regions, the growth of alfalfa in summer shows a relatively "dormant" state, resulting in a significant drop in grass production. The first-second stubble grass production accounts for more than 60% of the annual production. At the same time, the alfalfa field

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