种植密度和施肥对菜用大豆产量性状的效应研究

采用2因素4水平随机区组设计，研究了种植密度和磷肥施用量对菜用大豆“绿75”产量性状的影响。结果表明，每公顷施270kg磷酸二铵能有效地增加分枝数、分枝荚数、主茎荚数、单株总荚数、单株粒重、单株粒数和小区产量。每公顷45万株的密度可提高单株荚数，但百粒重降低。不同因素间互作效应表明，每公顷施270kg磷酸和45万株密度，能增加单株的分枝数、分枝荚数、单株粒重和单株粒数。每公顷在22.5万~45万株，施用磷肥能有效地提高单株的主茎荚数和单株总荚数。在施肥量相同时，随着密度的增加产量提高。

Effect of Plant Density and Phosphorus Application Rate On Yield of Vegetable Soybean

A field experiment was conducted to evaluate the effect of plant density and phosphorus application rate on yield of vegetable soybean variety, Lu75. The result showed that branches per plant, pods per branch, pods of main stem, pods per plant, seed weight per plant, seed number per plant and plot yield could be increased with the treatment of 270kg of phosphorus application rate per hectare. Whereas the density treatment of 450 000 plants per hectare could result in the increase of pods per plant, but decrease of 100-seed weight. It was showed that branches per plant and pods per branch, seed weight per plant and seed number per plant could be augmented with the factor interaction of 270kg phosphorus application rate and 450 000 plants per hectare. Increasing phosphorus application rate could effectively improve pods of main stem and pods per plant as density was 225 000~450 000. Phosphorus application could make pods of main stem and pods per plant increased. When phosphorus use was the same in amount, the yield could be increased with the density increasing.