A method of improving barren heavy saline-alkali land by planting pioneer crops

Abstract

Provided is a method for improving deserted heavy saline soil and planting pioneer crops. The method comprises the steps that platform fields are constructed, soil is desalinized and covered with mulching film, and the mulching film is uncovered at intervals into a strip shape; conditioner is applied, wherein the dosage of the conditioner is 7500-10950 kg / hm<2>; fertilizer application is conducted, wherein the fertilizer applied to the soil each hectare is converted into pure nitrogen of 56.3-82.5 kg, P2O5 of 36-52.8 kg, K2O of 22.5-33 kg; attapulgite and loss-control fertilizer with the nitrogen content higher than 26% are selected and mixed; after fertilization, sowing is conducted instantly; when second true leaves of oil sunflower appear, seedlings are thinned, gaps are filled with theseedlings, final singing of the seedlings is conducted, and meanwhile, weeding is conducted; intertillage hilling is conducted; redundant disks and leaves without nutrition are removed; harvest is conducted at appropriate time. According to the method for improving the deserted heavy saline soil and planting the pioneer crops, the deserted heavy saline soil is developed and improved, the soil fertility is improved, the salinity of the plough layer of the soil before sowing is reduced, compared with the prior art, the yield and benefits of the oil sunflower are increased, and the method has significant importance on ecological agriculture, green development and recycling efficient environment-friendly utilization on inferior soil and water resources.

Description

technical field [0001] The invention relates to an agricultural planting technology, in particular to a method for improving barren heavily saline-alkali land by planting pioneer crops. Background technique [0002] There are about 954 million hectares of saline-alkali land in the world, accounting for 10% of the land area and 7% of the cultivated land area. It is difficult for vegetation to grow on about 10-20 million hectares of saline-alkali land every year. In the arid and semi-arid coastal areas in northern my country, the area of ​​heavy saline-alkali land and manageable tidal flats is about 700,000 hectares. These areas are relatively rich in saline underground water resources. The underground water table is buried at a depth of 1m-2m all year round, and the salinity of groundwater in winter and spring is as high as 10g / L or more. When the monsoon climate is dry, windy, windy and dry in spring, the saline water in the soil returns to salt seasonally, making the salt ...

AI Technical Summary

Problems solved by technology

However, this method has the problem of large amount of fertilization and premature fertilization

Excessive fertilization not only causes waste of resources and environmental pollution, but also causes secondary salinization of the soil, aggravates soil saline-alkali hazards, and affects crop yield; premature fertilization causes the effective nutrient release of fertilizers to be out of sync with crop demand, and phosphorus fertilizers are easily deposited in the soil. Fixed in the middle, unable to meet the nutritional needs of crops

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