Method for planting sunflowers in moderate-severe saline-alkali soil through early film mulching, drip irrigation and salt inhibition

Abstract

The invention provides a method for planting sunflowers in moderate-severe saline-alkali soil through early film mulching, drip irrigation and salt inhibition, and belongs to the technical field of crop planting. According to the comprehensive salt inhibitation cultivation technology, a full-film-mulching machine is adopted, on the basis of normal autumn irrigation and spring irrigation of the moderate-severe saline-alkali soil, the film mulching time is advanced from the time of conventional film mulching before sowing to the time of autumn irrigation in the last year or early spring, a narrow white film is changed into a wide black film, and border irrigation in the growth period is changed into drip irrigation. Early film mulching can unfreeze soil in advance, inhibit soil salt return in spring and provides a low-salt growth state environment for the sunflower growth period. The conventional narrow white film is changed into the wide black film, so that weed cluster under the film can be inhibited, and salt return between rows can be effectively prevented. Flood irrigation in the sunflower growth period easily causes dead seedlings, drip irrigation is adopted to dilute salt in a plough layer of soil, the seedling protection rate is improved, and meanwhile, water and fertilizer are supplemented in time according to the water and fertilizer demand rule of the sunflowers through matched drip irrigation. The technical method is beneficial for planting sunflowers in saline-alkali soil to improve yield and improve utilization rate of the saline-alkali soil.

Description

technical field [0001] The invention relates to the technical field of crop planting, in particular to a method for planting sunflowers on medium-severe saline-alkali land with film-mulching drip irrigation and salt-suppressing planting. Background technique [0002] The Hetao irrigation area is a typical saline soil development area in my country, and the saline soil accounts for 44% of the total cultivated land area. In recent years, the degree of secondary salinization of soil has a tendency to increase. Sunflowers are the main crops planted in the saline-alkali land in the Hetao irrigation area. In view of the high groundwater level in the moderate-to-severe saline-alkali land in the Hetao irrigation area, the salt surface accumulation is serious, and the salt return is serious during the crop growth period, which makes it difficult for crops to emerge, maintain seedlings, and grow. It is urgent to find technological breakthroughs, innovate planting methods, reduce salt...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems of difficult seedling emergence, difficult seedling preservation, and poor growth caused by salt damage in sunflower planting in moderately severe saline-alkali land, and provides a method for planting sunflowers in medium-severe saline-alkali land with film-covering drip irrigation and salt suppression, including the following steps:

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