Water-retaining agent improving alfalfa drought tolerance and preparation method thereof

Abstract

The invention discloses a water-retaining agent improving alfalfa drought tolerance and a preparation method thereof. The water-retaining agent comprises, by weight, 60-80 parts of starch-grafting acrylate particles, 20-30 parts of organic fertilizer particles, 5-10 parts of soil ameliorant particles and 15-20 parts of ceramsite. The organic fertilizer particles comprise 100-150 parts of livestock excrement, 30-50 parts of humic acid, 20-40 parts of straw, 40-60 parts of bagasse, 10-20 parts of peanut meal, 5-10 parts of sawdust and 5-10 parts of fishbone powder. The soil ameliorant particles comprise 0.25-0.3 part of ammonium molybdate, 0.1-0.2 part of potassium borohydride, 0.05-0.08 part of boronic acid, 0.05-0.08 part of borax, 0.1-0.2 part of ferrous sulfate, 0.3-0.4 part of ammonium ferrous sulfate, 1-2 parts of zinc sulfate, 0.05-0.1 part of manganese sulfate, 0.2-0.3 part of monopotassium phosphate, 0.2-0.4 part of sodium selenate and 5-8 parts of photosynthetic bacterium inoculants. The ceramsite is obtained by mixing and forging attapulgite, biological sludge, vermiculite powder and river bottom mud.

Description

technical field [0001] The invention relates to the technical field of alfalfa planting, in particular to a water-retaining agent for improving drought tolerance of alfalfa and a preparation method thereof. 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...

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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.