Water and fertilizer regulation and control method for improving yield of alfalfa tame pasture of newly-reclaimed sloping field at river valley in arid region

Abstract

The invention relates to a water and fertilizer regulation and control method for improving the yield of an alfalfa tame pasture of a newly-reclaimed sloping field at a river valley in an arid region, and the method mainly aims at the problems that the alfalfa tame pasture of the newly-reclaimed sloping field at the river valley in the arid region is large in slope, is thin in soil layer and is poor in water holding and fertilizer retaining capability and the yield is caused by the reduction of soil fertility to be unstable because water and soil loss is liable to happen. Through employing small-water-flow multi-frequency intermittent sprinkling irrigation and combining with fertilization management, the method reasonably optimizes the water and fertilizer application steps and mod. The method enables the water holding and fertilizer retaining of the soil of the alfalfa tame pasture of a thin soil sloping field at the river valley in the arid region to be fully coupled to water and fertilizer application through scientific water and fertilizer regulation and management. The method increases the effectiveness of water and fertilizer, prevents water and soil loss, guarantees the demands of alfalfa for water and fertilizer, and achieves the water and soil retaining and water saving stable yield of the alfalfa tame pasture. The method is suitable for the newly-reclaimed sloping field at the river valley in the arid region, especially for the yield increasing and stabilizing of the alfalfa tame pasture of the thin soil sloping field at the river valley in the arid region, wherein the slope is greater than 2%, and the thickness of the soil layer is 20cm-50cm.

Description

technical field

[0001] The invention relates to a technology for increasing production of artificial pastures on newly reclaimed sloping fields in valleys in arid regions, and in particular to a water and fertilizer control method for increasing the yield of alfalfa artificial pastures on sloping fields with newly reclaimed sandy thin soil layers in river valleys in arid regions. Background technique

[0002] The arid area in Northwest my country accounts for more than a quarter of the country's land area. The dry and rainless climate, weak soil development and sparse vegetation cover have created a fragile and easily disturbed ecological environment in the arid area. The limited suitable water and soil natural resource conditions and the social and historical development process in the arid area have created the economic and social development model in the arid area of ​​Northwest China, which is dominated by agriculture and animal husbandry. More than 90% of the agricultu...