Method for monitoring and regulating and controlling pH value of bed soil in seedling raising process of rice in saline-alkali soil

Abstract

The invention provides a method for monitoring and regulating and controlling the pH value of bed soil in the seedling raising process of rice in saline-alkali soil. When the pH value of seedling raising bed soil is more than or equal to 6.5, the bed soil is sprayed or subjected to root drenching with acidic water, so that seedlings at the initial stage of the disease are treated effectively, thelarge-area seedling blight in the rice seedling stage can be prevented from occurring, and the seedling raising loss can be reduced substantially. The acidating water of which the pH value is 5.5 is sprayed to experimental bed soil of which the pH value is 5.5 before sowing and the pH value is 6.5 after sowing for 15 days, the incidence rate of the seedling blight is 0 percent, and disease-free strong seedlings of rice are cultivated finally; and the incidence rate of a control sample of the experimental bed soil is 5 percent. The acidating water of which the pH value is 4.0 is sprayed to comparison bed soil of which the pH value is 6.5 before sowing and the pH value is 7.8 after sowing for 15 days, the incidence rate of the seedling blight is below 20 percent, so the success rate of seedling raising is improved; and the incidence rate of a control sample of the comparison bed soil is over 50 percent. Experiments prove that the method is low in cost, simple in operation and obvious ineffect and has the wide application value.

Description

technical field [0001] The invention belongs to the technical field of soil management and relates to rice seedling raising technology, in particular to a method for monitoring and regulating the acidity and alkalinity of bed soil in the process of raising rice seedlings in saline-alkali land. Background technique [0002] Rice seedling raising is an important part of rice mechanized cultivation. Whether disease-free and strong rice seedlings can be cultivated during the seedling raising period is the key to high rice yield. To cultivate disease-free and strong seedlings of rice, many growth environmental factors must be controlled, such as temperature, water, nutrients, light, soil type, texture composition, and pH value. Among them, the pH value of the seedling bed soil before sowing and the scientific regulation and management of pH value during the seedling raising process determine the success or failure of rice seedling raising. [0003] In the past, more attention wa...

AI Technical Summary

Problems solved by technology

Especially in the years of low temperature in early spring or large daily temperature changes, if the pH of the rice seedling bed soil in the greenhouse rises too fast, the blight will spread rapidly, and the incidence of blight at the seedling stage will increase significantly. It leads to the death of a large area of ​​rice seedlings, which cannot be used for transplanting or causes the phenomenon of lack of seedlings and broken strips during mechanical transplanting, which deeply affects the harvest of rice.

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