Method for improving drought resistance of alfalfa

Abstract

The invention discloses a method for improving the drought resistance of alfalfa. The method comprises following steps: an alfalfa plot is deeply ploughed for 42-45 cm; the soil is deeply dug for 30-35 cm, the residual soil layer is leveled, and boxes are placed on the soil layer, wherein the side wall and the bottom portion of each box are provided with through holes, and the upper portion of each box is provided with an opening; 40-50% of the dug soil and a water-retaining agent are mixed to achieve the mixing soil, and the mixing soil is loaded into the boxes, wherein the loading volume of the mixing soil accounts for 2 / 3 of the volume of each box; a cover plate provided with meshes covers the mixing soil; the residual soil covers the cover plate to form a planting layer; ribs are made on the planting layer, furrows are arranged between the ribs, and alfalfa seeds are planted in the ribs; and furthermore, a headrace and a water storage well are arranged on one side of the alfalfa plot, one end of each furrow is enclosed, and the other end of each furrow is communicated with the headrace, so that rain water can flow into the water storage well along the furrows through the headrace, and water can be taken out from the water storage well when irrigation is required to be carried out.

Description

technical field [0001] The invention relates to the technical field of alfalfa planting, in particular to a method for improving drought tolerance of alfalfa. Background technique [0002] Alfalfa is a perennial forage grass that is widely cultivated around the world. It has high yield, rich nutrition, good palatability and wide adaptability, and is known as the king of forage grass. [0003] However, about 1 / 3 of the land in our country is in the arid area, with an annual drought-affected area of ​​2 to 2.7 million square kilometers, and large natural pastures are often located in arid areas. How to improve the drought resistance of alfalfa so that the annual rainfall of alfalfa is Good growth in smaller arid areas is significant. [0004] At present, there have been studies on the use of specific water-retaining agents for alfalfa planting drought resistance. However, in traditional planting methods, although water-retaining agents can absorb rainwater and form temporary ...

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Problems solved by technology

[0004] At present, there have been studies on the use of specific water-retaining agents for alfalfa planting drought resistance. However, in traditional planting methods, although water-retaining agents can absorb rainwater and form temporary "reservoirs" that can be released slowly, generally after a period of time Finally, due to the long-term extrusion, the water-absorbing capacity of the water-retaining agent will decrease as time goes on, which will seriously affect the effect of water retention and drought resistance.