Method for determining water burial depth most appropriate for growth of cotton in seaside saline and alkaline land

Abstract

The invention discloses a method for determining the water burial depth most appropriate for the growth of cotton in seaside saline and alkaline land. The method comprises the following steps: (1) setting different water burial depth treatments to test the water content and electrical conductivity of soil in a concentrated root region during key cotton growth periods, thereby determining the water and salt content of the soil of the concentrated root region of the cotton with different water burial depths and during different growth periods; (2) testing the physiological indicators of the key cotton growth periods; (3) testing the cotton yield and fiber quality; (4) determining the optimal water burial depth by synthesizing the proper water and salt content and physiological indicators of the soil of the concentrated root region of the cotton. According to the method, the optimal water burial depth most appropriate for the growth of the cotton in the coastal reclamation area and helpful for achieving the purposes of salt removal and waterlogging reduction can be determined by virtue of using the groundwater burial depth as a medium, taking general spatial and temporal water and salt distribution researches conducted through the different water and salt treatments based on the water and salt change of the soil in the concentrated root region during the main cotton growth periods as a core, and employing the root system growth under the ground and the cotton yield and quality above the ground of cotton plants as the main indicators.

Description

technical field [0001] The invention relates to the field of cotton salinization planting, in particular to a method for determining the water depth for optimum growth of cotton in coastal saline-alkali land. Background technique [0002] my country is one of the countries with the largest area of ​​saline-alkali land in the world. The area of ​​coastal saline-alkali land is increasing year by year, and its potential for development and utilization is great. Under the premise of ensuring my country's food security, the contradiction between grain and cotton land competition is prominent, and the limited and good arable land must be reserved for the four major food crops such as rice, corn, wheat, and potatoes. Cotton has strong salt tolerance, and has always been recognized as a pioneer crop in the development and utilization of saline-alkali land. Economic development has also increased people's demand for cotton. Therefore, it is inevitable to transfer cotton to saline-alk...

AI Technical Summary

Problems solved by technology

[0003] There have been a lot of studies on the influence of single soil moisture or salinity on cotton yield and quality, but there is no research on the impact of water and salt migration on the temporal and spatial changes of soil moisture and salinity in the root-intensive area of ​​cotton, which affects cotton yield and quality, us

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