Direct-sowing planting method used for rice in arid land and based on metal drought-resistant agent

Abstract

The invention provides a direct-sowing planting method used for rice in the arid land and based on a metal drought-resistant agent. The method comprises steps as follows: field management: the loose soil layer is made to be 15-20 cm through mechanical rotary tillage, bottom fertilizer is applied, the land is raked to be flat, and the water content of soil is 60%-70%; sowing: rice seeds are manually sown in drill at the row spacing of 25-30 cm, and the sowing rate is 60-70 kg / hm<2>; water management: after seedlings of rice come out, first water irrigation is performed, the metal drought-resistant agent is sprayed for irrigation, a rain-fed mode is taken as a primary at other time, and irrigation is performed only when the water potential of the soil is lower than minus 50 kPa; fertilizer management: the total application amount of pure nitrogen is 270 kg / hm<2>, the ratio of base fertilizer, tillering fertilizer and earing fertilizer is 2:4:4, the tillering fertilizer is applied in a one-tip three-leaf stage, the ratio of nitrogen, phosphorus and potassium is 2:1:1, phosphorus fertilizer is subjected to one-time basal application, and potassium fertilizer is applied before ploughing and at the stage of stem elongation in equal amount; control management of diseases, pests and weeds; harvesting. According to the sowing method for rice in the arid land, the metal drought-resistant agent containing calcium, magnesium, copper and iron is used at little dosage, has a good effect and is low in cost and friendly for the environment and human bodies.

Description

technical field [0001] The invention belongs to the field of rice planting, and in particular relates to a direct seeding planting method of rice in dry land based on a metal drought-resistant agent. Background technique [0002] Rice is one of the important food crops. More than half of the population in China takes rice as a staple food. With global warming, in recent years, large-scale droughts have frequently occurred in the south and north of my country. The drought has caused most crops to fail to mature normally, and even appear The problem of reduced or no harvest has restricted the sustainable development of rice production and brought a crisis to food security. [0003] Drought is the phenomenon of water deficit in the tissue when the water consumption of the plant is greater than the water absorption, and the phenomenon of excessive water deficit. Drought resistance of crops refers to the property of crops to endure drought with the least damage and the least yiel...

AI Technical Summary

Problems solved by technology

In this planting method, the rice seedling period is short, the emergence rate is high, and the manual management is simple. The drought-resistance agent used is starch-grafted acrylate drought-resistance agent, which belongs to a kind of water-retaining agent. The process is complicated and the cost is high, so it is not suitable Large-scale use, and a large amount of use will affect the physical and chemical properties of the soil to varying degrees