Double cropping rice yield increase method

Abstract

The invention discloses a double cropping rice yield increase method and relates to the technical field of agricultural planting. The method includes the following steps of during planting of double cropping rice, reducing application of chemical nitrogen fertilizer and adopting green manure for mixed cropping to achieve yield increase of double cropping rice. During adoption of the green manure for mixed cropping, four patterns are applied, wherein astragalus sinicus L. is adopted for monoculture AS under the first pattern, astragalus sinicus L. and ro-phanus sativus L.var.raphahistroides areadopted for mixed cropping AR under the second pattern, astragalus sinicus L. and lolium perenne L. are adopted for mixed cropping AL under the third pattern, and astragalus sinicus L., ro-phanus sativus L.var.raphahistroides and lolium perenne L. are adopted for mixed cropping ARL under the fourth pattern. Through research, it is determined that by adopting the green manure for replacing partialbasal application of chemical nitrogen fertilizer, increase of the yield of the double cropping rice is facilitated, and a great effect can be achieved by adopting astragalus sinicus L. for monoculture and adopting astragalus sinicus L. and ro-phanus sativus L.var.raphahistroides for mixed cropping.

Description

technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a method for increasing the yield of double-cropping rice. Background technique [0002] At present, there are more than 3000 kinds of known green manure species, mainly leguminous, cruciferous and gramineous. Leguminous green manure milk vetch (Astragalus sinicus L.) has been widely used because of its strong nitrogen fixation ability, but milk vetch single seeding has poor ability to cope with natural disasters, and although milk vetch contains a lot of nitrogen, it has phosphorus, Potassium is relatively low, and the C / N value is low, so the nutrient types and release supply are unbalanced in the subsequent cropping; at the same time, milk vetch single-cropping will have the disadvantage of good crops and poor grains due to its high nitrogen supply, which will cause The growth period of rice is delayed, and the late ripening of green rice may also induce the out...

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a method for increasing the yield of double-cropping rice, the main purpose of which is to solve the problem of how to design a green manure mixed cropping method to increase the yield of double-cropping rice under the condition of chemical nitrogen fertilizer reduction and application

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