Method for gradually replacing tobacco nitrogen fertilizers with multicropping vetches

Abstract

The invention discloses a method for gradually replacing tobacco nitrogen fertilizers with multicropping vetches. The method comprises the following steps of hole-sowing a row of Yunguang early vetches on each of two sides of tobaccos on a tobacco planting ridge, and cradling, chopping, turning and pressing fresh Yunguang early vetches in early March of the next year at the period of full bloom, wherein the using amount of low- and medium-fertility soil is 15,000 kg / hm<2>, and the using amount of high-fertility soil is 7,500 kg / hm<2>; aftercropping the tobaccos, and continuously multicropping the tobaccos and the vetches. Compared with the using amount of conventional fertilizer application, the using amount of tobacco nitrogen fertilizers is reduced by 15 percent in the first year and is progressively decreased year by year on the basis of the using amount of the last year according to 15 percent until the using amount of the nitrogen fertilizers is progressively decreased to zero. According to the method, the using amount of the tobacco nitrogen fertilizers is greatly reduced; furthermore, the yield of tobacco products can be obviously improved and is increased by over 10 percent; the quality of the tobacco products is obviously improved; the output value is increased by over 14 percent; the effect of improving the soil is outstanding; the average annual increase of organic matters in the soil is 0.025 percent; the average annual decrease of the volume weight of the soil is 0.011 g / cm<3>.

Description

technical field [0001] The invention relates to the technical field of low-consumption, high-efficiency and sustainable development of agricultural cultivation, in particular to a method for gradually replacing tobacco nitrogen fertilizer by multiplanting sweet potatoes. Background technique [0002] The tobacco planting method in the prior art relies heavily on the application of chemical fertilizers, which has prominent continuous cropping obstacles, and causes degradation symptoms such as soil compaction for tobacco planting and decreased productivity. It is an unsustainable production method. To sum up, there are following defects and deficiencies in the tobacco planting mode of prior art: [0003] (1) Heavy chemical fertilizers, light organic fertilizers. The field production of tobacco in the prior art has always followed the fertilizer and water management experience of "attack before and control later", that is, after the tobacco seedlings are planted and survived, ...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome defects and deficiencies such as existing tobacco planting methods that rely heavily on nitrogen fertilizer, poor growth and development of middle and upper leaves, and damage to soil and biodiversity, and propose a method that can continuously protect soil and greatly reduce Tobacco nitrogen fertilizer application, the method of gradually replacing tobacco nitrogen fertilizer by multi-cropping sweet potato that can alleviate the obstacles of tobacco continuous cropping at the same time

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