Once-sowing perennial self-production method of milk vetch in mechanically-transplanted single cropping rice field

Abstract

The invention discloses a once-sowing perennial self-production method of Chinese milk vetch in mechanically-transplanted single cropping rice field, relating to cultivation and utilization of Chinese milk vetch in single cropping rice field under the condition of adopting mechanical transplanting, particularly suitable for the green manuring rotation system of rice in the Taihu Lake region. In the method, Chinese milk vetch is interplanted in the rice field, and the method particularly comprises the following measures of: selecting an early or medium ripening Chinese milk vetch variety; ensuring that the Chinese milk vetch is ploughed and return to field during the period from May 10 to May 20; and ensuring that rice seedlings are transplanted mechanically during the period from early June to June 20; ditching the three channels for irrigating and draining after rice is harvested, and taking other measures. By using the method disclosed by the invention, the once-sowing perennial self-production of Chinese milk vetch is realized, the seed and manual seeding expense is reduced by 66.7% every year, the yield of the rice is improved by more than 7%, the rice effect is increased by 30-50 Yuan, and the organic matter content in the soil is improved by about 0.02 mg / Kg. The method saves labor, reduces cost, improves rice output, improves integrative benefit of the rice, combines ground utilization and ground cultivation and has good popularization and application prospects.

Description

technical field [0001] The invention relates to a method for self-propagating and utilizing milk vetch in a single-crop paddy field by one-time sowing for many years by machine-transplanting rice seedlings, which is suitable for planting and utilizing milk vetch on the premise that machine-transplanted rice is used in a single-crop rice field. Background technique [0002] Milk vetch is a green manure crop that can fix nitrogen in the air. Generally, milk vetch can fix 5-10 kg of pure nitrogen per mu. It has been planted in the Taihu Lake Basin for a long time. In the 1970s, the planting area of ​​milk vetch accounted for more than one-third of the cultivated land area. The traditional planting and utilization technology of milk vetch in paddy field is interplanting before the rice field is harvested every autumn, and plowing and returning to the field in the second spring when the milk vetch is in full bloom. As a kind of green manure, there is no direct economic benefit f...

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Problems solved by technology

[0003] However, in recent years, the sown area of ​​milk vetch has a tendency to rise to a certain extent. The main reason is that the government realizes that the large-scale use of chemical fertilizers not only reduces the quality of cultivated soil and fertilizer utilization efficiency, but also accelerates the loss of nitrogen and phosphorus in paddy fields. The eutrophication of water bodies has caused serious environmental problems. Therefore, the government has increased investment and rewarded milk vetch planting to promote the development of milk vetch. Secondly, driven by the breeding industry, planting grass and raising livestock has once again been accepted by many farmers. Third, the promotion of rice machine transplanting, land transfer, and the emergence of large planters, thus promoting the recovery of milk vetch

[0004] Although planting milk vetch in paddy fields and using rhizobia to fix nitrogen can improve soil fertility and increase rice yield, it can also be used as green feed for livestock or picked as vegetables in early spring, but because it cannot directly generate benefits, coupled with the annual purchase and sowing of seeds and other cost factors restrict the cultivation of milk vetch

[0005] In order to solve the problem of high cost of planting milk vetch, many researchers have done a lot of research work and made gratifying progress. In 2005, Zhu Puping, Jiangsu Academy of Agricultural Sciences reported a cost-effective and efficient rice-field milk vetch. However, their research is limited to the cultivation method of milk vetch under the condition of conventional rice planting, and no further research has been done on the use of milk vetch for many years of self-propagation under the premise of machine-transplanted rice and the impact on the quality of soil cultivated land. Therefore, under the premise of large-scale promotion of machine-transplanted rice seedlings in the Taihu Lake area, the technology of multi-year self-propagation and utilization of milk vetch for one-time sowing has not been widely used in actual production. It is still necessary to use the method

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