Spring wheat fertilizing method aiming at salinized farmland

Abstract

The invention discloses a spring wheat fertilizing method aiming at a salinized farmland. The method comprises the following steps: at the beginning of the first year, spraying 45kg / hm<2> of water-retaining agent on the surface layer of a farmland before the seeding of spring wheat, and plowing by utilizing a machine so as to ensure that the soil on the surface layer is fully mixed with the water-retaining agent; applying 984.4kg of calcium superphosphate and 195.7kg of urea into the soil per hm<2> while the seeding of the spring wheat is carried out; before the wheat is irrigated with water for the first time, applying 195.7kg of urea to the soil per hm<2>; before the wheat is irrigated with water in the autumn, applying 13500kg of organic fertilizers to the soil per hm<2>, plowing by utilizing the machine, evenly mixing and then irrigating the wheat with the water; in the second year, applying 984.4kg of calcium superphosphate to the soil per hm<2>, and applying 195.7kg of urea to the soil per hm<2> before the wheat is irrigated with the water for the first time; and in the third year, carrying out fertilizer application which is the same as that in the second year, and thus finishing one period. According to the method, the demands of the spring wheat in growth periods on the water and the fertilizers can be met, and the long-acting performance of the fertilizers is further enhanced so as to reduce agricultural non-point source pollution.

Description

technical field [0001] The invention relates to a method for fertilizing wheat, in particular to a method for fertilizing spring wheat in salinized cultivated land. Background technique [0002] The Hetao irrigation area in Inner Mongolia is a typical area where soil salinization develops in China. Mildly salinized soil accounts for about 49.5% of the cultivated land area, and moderately and severely salinized soil accounts for about 31% of the cultivated land area. Due to long-term inappropriate irrigation and fertilization The measures have made the secondary salinization of soil become more serious. At the same time, in the process of agricultural production in irrigated areas, the amount of chemical fertilizers is increasing year by year, but the efficiency of fertilizer use has not been improved. Only a small part of the applied chemical fertilizers is absorbed and utilized by crops, and the rest is lost in the process of farmland irrigation and precipitation. As a res...

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Problems solved by technology

At the same time, in the process of agricultural production in irrigated areas, the amount of chemical fertilizers is increasing year by year, but the efficiency of fertilizer use has not been improved. Only a small part of the applied chemical fertilizers is absorbed and utilized by crops, and the rest is lost in the process of farmland irrigation and precipitation. As a result, the pollutant content of each ditch exceeds the environmental capacity that the agricultural irrigation water source can bear, and agricultural non-point source pollution has become an important restrictive factor affecting the water environment quality of the irrigation area in the upper reaches of the Yellow River.

[0003] At present, in the local agricultural production process, inorganic fertilizers occupy a dominant position, with the characteristics of convenient application and easy absorption. However, with the long-term excessive application of chemical fertilizers, serious social problems such as slow crop yield increase, soil compaction, fertility decline, and ecological pollution have been caused. question

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