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田菁作为短期绿肥,在稻田淹水栽培条件下种植,我省尚处于试验示范阶段。过去的试验,虽已能看出田菁增肥增产的效果,但由于田间试验控制条件较差,田菁在淹水栽培条件下的固氮效能究竟有多大,并不十分清楚。本试验的目的,在于探讨田菁在淹水栽培条件下的养分变化规律及其固氮效能,为在稻田合理利用田菁绿肥提供科学依据。
As a short-term green manure, Sesbania is planted under flooded cultivation conditions in rice paddies, and the province is still in the experimental stage of demonstration. Although past experiments have shown the effect of increasing yield of Soybean, it is not very clear whether Soybean has a high nitrogen fixation efficiency under flooded cultivation due to poor control conditions in field trials. The purpose of this experiment is to explore the law of nutrient content and its nitrogen-fixing efficiency under the condition of flooding and cultivation, and to provide a scientific basis for the rational utilization of Sesbania green manure in paddy field.