A method for regulating irrigation during flowering period based on precipitation from jointing to flowering stage of winter wheat

Abstract

The invention relates to a method for regulating irrigation during the flowering stage based on precipitation from jointing to flowering stage of winter wheat, which belongs to the technical field of crop irrigation. , On the basis of cultivating strong seedlings before winter, no irrigation is carried out before winter wheat overwintering and during the filling period, and the irrigation water volume is 50-60m in the jointing period 3 / mu, the amount of irrigation water in the flowering period is based on the precipitation from jointing to flowering period. When the precipitation is not less than 25mm, no irrigation is performed, and the yield reduction can be controlled within 10%. When the precipitation is less than 25mm, irrigation Water volume 40‑50m 3 In addition, there is no need to irrigate before overwintering and during the filling period. This method can be widely used in the winter wheat planting system in North China. It has the dual effects of stabilizing yield and saving water. is of great significance.

Description

technical field [0001] The invention belongs to the technical field of crop irrigation, and relates to an irrigation method for winter wheat, in particular to a method for regulating and controlling irrigation in the flowering stage based on the precipitation from jointing to flowering stage of winter wheat. Background technique [0002] The North China Plain is an important main grain production base in my country, and it is also one of the most water-scarce areas, with the total water resources accounting for only 7.6% of the country's total. Double cropping of winter wheat and summer corn is the main planting method in the North China Plain. Due to the influence of the monsoon climate, the precipitation is mainly distributed in the summer corn season, while the winter wheat season is dry and less rainy. The average annual rainfall is only about 100mm, which is much lower than the growth period of winter wheat. The water consumption is 350-450mm, so in order to obtain high...

AI Technical Summary

Problems solved by technology

The flowering period of winter wheat is the key growth period for pollination and fruiting and then for grain filling. Since the jointing period of winter wheat, the precipitation in this area has gradually increased, but the inter-annual variation is large. The variation range of precipitation is 0-57mm. If the precipitation before flowering of winter wheat is relatively low, and the soil moisture content is low during the flowering period, timely irrigation is required, and the effect of increasing yield is remarkable. Blind irrigation will not only increase the yield, but also waste water resources. Therefore, in order to achieve the dual purpose of water saving and high yield of winter wheat, the irrigation decision in the flowering period is particularly important.

[0004] In the past, the determination of whether to irrigate winter wheat during the flowering period was mainly based on seedling conditions and soil moisture. The judgment of seedling condition indicators lacked a unified standard and was often based on experience, and the seedling conditions of different plots were also quite different. However, the measurement of soil moisture content is cumbersome and can only be limited to a few sites in a specific plot, and the large-scale measurement of multiple plots and multiple sites is not practical. Therefore, the regional representativeness of soil moisture monitoring is relatively low. Difference

In short, judging whether winter wheat needs to be irrigated during the flowering period according to the seedling condition and soil moisture is blind, the application range is small, and the operability is poor.

In recent years, remote telemetering moisture content intelligent control irrigation systems have also been gradually applied to farmland irrigation decision-making and early warning, but these systems are relatively complex, difficult to operate and maintain, poor in stability, and expensive in construction. They are generally used in small areas and have high added value. In ornamental horticulture and protected agriculture, the application of irrigation decision-making in the process of regionalized field crop planting is still relatively small

To sum up, there is still a lack of simple, effective, and regionally adjustable irrigation methods for winter wheat flowering in actual production.

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