Fire-cured tobacco cultivation technique mode by concave double-ridge plastic membrane mulching during whole breeding season

Abstract

The invention discloses a whole-growth period plastic mulching cultivation technical mode with double-row concave ridges in a flue cured tobacco field. The tobacco field is plowed and divided to form the double-row concave ridges with a width of 220cm and a height of 15-35cm; a row distance which is 100cm is arranged between the two rows of the concave ridge peaks, and a concave ridge groove is arranged between two rows of the ridge peaks; the peak of the double-row concave ridge is 120cm away from the peak of another double-row concave ridge; the double-row concave ridges are covered by an agricultural plastic mulch with a width of 200cm; tobacco seedling holes are dug on the peaks of the concave ridges at a plant distance of 55-60cm in each row; the depth of the concave ridge groove is 8-12cm, and pervious holes with a diameter of 1cm are dug on the agricultural plastic mulch on the valley of the groove at a vertical distance of 60cm; a basic fertilizer is applied before mulching, and an additional fertilizer is applied 20 days after transplanting. The technical mode can help realize effective water collection, water conservation, fertilizer conservation, temperature adjustment, soil moisture preservation and weed suppression, reduce fertilizer input, save labor, effectively increase the yield and quality of tobacco leaves, and increase economic benefit of tobacco growers.

Description

technical field [0001] The invention relates to a field cultivation technology of flue-cured tobacco, in particular to a film-covered cultivation technology of concave double ridges for the whole growth period of flue-cured tobacco. Background technique [0002] In the existing flue-cured tobacco field cultivation mode, there are usually a variety of planting modes with different ridges and matching mulch, including single ridge without mulch, single ridge covered with straw, single ridge covered with plastic film, concave ridge without cover, and double ridge. Straw-covered ridges, double-row mulch-covered ridges, and the cultivation mode of no ridges and no mulch on flat land, each of these cultivation modes has its own advantages and disadvantages. For the tobacco area in northern Guizhou, which is one of the southwestern tobacco areas, it is based on mountainous areas. In the main flue-cured tobacco production areas, the soil layer and soil plow layer are relatively thin...

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Problems solved by technology

[0002] In the existing flue-cured tobacco field cultivation mode, there are usually a variety of planting modes with different ridges and matching mulch, including single ridge without mulch, single ridge covered with straw, single ridge covered with plastic film, concave ridge without cover, and double ridge. Straw-covered ridges, double-row mulch-covered ridges, and the cultivation mode of no ridges and no mulch on flat land, each of these cultivation modes has its own advantages and disadvantages. For the tobacco area in northern Guizhou, which is one of the southwestern tobacco areas, it is based on mountainous areas. In the main flue-cured tobacco production areas, the soil layer and soil plow layer are relatively thin, and the ability to retain fertilizer and water is poor. Although the local annual rainfall is above 1000mm, due to the uneven temporal and spatial distribution of rainfall and poor soil water retention capacity, there are A large part of the flue-cured tobacco in the tobacco growing area is basically under mild or moderate drought stress during the field growth period. Spring drought and summer drought have become the limiting factors for the production of flue-cured tobacco in some tobacco areas in northern Guizhou. The drought stress caused by insufficient soil moisture is very large. To a certain extent, it limits the further improvement of tobacco leaf production in this region

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