Alkaline land cotton pre-coating film seedling establishment method

Abstract

The invention discloses a seedling formation method in alkaline lands by pre-coating film on cotton, which aims at increasing the seedling formation rate of the cotton in alkaline lands and realizing seedlings full and strong. The method of the invention is characterized in that: cotton fields having the salt content of below 0.4% and has certain accumulative rain and snow in winter are thawed in early spring, then ditches are opened in the rows of the pre-sowed cotton, and 2 tons of miscellaneous manure and 40 to 60kg of compound fertilizer which contains about 15 percent of N, about 15 percent of P2O5 and about 15 percent of K2O are fertilized, and then mulching film is used for covering the ditches immediately after the ditches are covered with soil and raked; as for an alkaline land with salt content of more than 0.4 percent, 80m<3> of fresh water is irrigated for each mu (mu: a Chinese unit of area, 1 / 15 of a hectare) at the end of winter to restrain salt content, ditches are opened and then miscellaneous manure and N-P-K compound fertilizer are fertilized in the early of middle of March, and film is covered after the land is prepared. The cotton fields which are leveled, fertilized and pre-coated with film are steadily passes earth temperature of 15 DEG C at the position of 5cm below the film, then bunch planting the ditinted and coated cotton seeds according to preset row spacing and plant spacing. The cottons are thinned out after the young seedling grow tidily, and final singling is carried out after two true leaves come out. The method of the invention achieves the functions of increasing temperature, water preserving and controlling salt by pre-coating the mulching film, promotes the seedling emergency and formation of cottons in alkaline land sand realizes synergetic salt control effect by concentrated fertilization under the film, thereby having significant yield increasing effect.

Description

technical field [0001] The invention provides a method for pre-covering plastic film in early spring in saline-alkali land to promote cotton seedling emergence and realize full and strong seedlings, and is suitable for cotton planted in inland and coastal saline-alkali land. Background technique [0002] my country's main cotton-producing areas are also important grain-producing areas, and there has always been a conflict between grain and cotton. As my country's food security issues become increasingly prominent, it is unrealistic to expand cotton planting areas in major grain and cotton producing areas. Relying on the characteristics of strong salt tolerance of cotton, it is a realistic and feasible way to fully tap the potential of cotton planting in saline-alkali land in my country. my country's saline-alkali land resources are very rich, and there are saline-alkali land resources of various sizes in the major cotton-producing areas. It is of great significance for the...

AI Technical Summary

Problems solved by technology

Although these anti-salt agents are easy to prepare, the application effect under field conditions is very limited, and the seeds must be soaked, which is very inconvenient to use; the publication number is "A Saline-alkaline Soil Improver" with the publication number CN1317539A and "A Salt Improver" with the publication number CN1263142A Alkaline Soil Improver and Preparation Method thereof” discloses a saline soil improver applied to the soil, although it has a certain improvement effect, but the amount is large and the cost is high

Liu Shengtian and Han Changsheng disclosed a method of using plastic film sheds and plastic film coverings to cultivate cotton in saline-alkali soils in "Research on High-yield and High-quality Cultivation Techniques of Cotton Double-film Covering in Saline-Alkaline Lands" ("Journal of Cotton Science", 1997, No.5, 261-266) The double-film mulching cultivation method has a good effect of promoting seedling emergence and increasing production, but it is difficult to popularize and apply it in production because of the large amount of labor and large investment.

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