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以绥农14为材料,采用框栽与15N示踪相结合的方法,研究侧向施肥距离变化对大豆氮磷钾吸收及产量的影响,为合理施肥位置的确定提供依据。结果表明:大豆植株干物质积累及产量随着侧向施肥距离的增加呈逐渐减少的趋势;盛荚期(R4)之前大豆植株干物质积累量以种下6 cm施肥最高,成熟期(R8)干物质积累量及产量以种下6cm侧向6 cm处理最高,在侧向0~12 cm处理间无明显差异。大豆植株氮磷钾含量及积累量与干物质积累及产量表现出相同的趋势,即随着侧向施肥距离的增加而逐渐降低;大豆生长发育前期(V3~R1)植株氮磷钾含量及积累量以种下6 cm施肥处理最高,中后期(R2~R8)以种下6 cm侧向0~12 cm范围内施肥效果较好。施于种下6 cm侧向0~6 cm最有利于大豆开花前对氮肥的吸收,明显优于种下6 cm侧向18~24 cm施肥处理对氮肥的吸收效果。
Taking Suining 14 as material, the effects of lateral fertilization distance on N, P and K uptake and yield of soybean were studied by the combination of frame planting and 15N tracing, which provided basis for the rational fertilization location. The results showed that the dry matter accumulation and yield of soybean plants tended to decrease with the increase of lateral fertilization distance. The dry matter accumulation of soybean plants before sowing date (R4) The dry matter accumulation and yield were the highest in the 6 cm lateral 6 cm and the lateral 0 to 12 cm. The contents of nitrogen, phosphorus, potassium and accumulation of soybean plants showed the same trends as the accumulation of dry matter and the yield of soybean plants, which decreased with the increase of lateral fertilization distance. The contents of nitrogen, phosphorus, potassium and accumulation of the plants in the early stage of soybean growth (V3 ~ R1) The amount of fertilization was the highest in the 6 cm seedling, and the middle and late fertilization (R2 ~ R8) was better in the range of 0 ~ 12 cm in the lateral direction of 6 cm. Applying 6 cm in the lateral direction 0-6 cm was the most beneficial to the absorption of nitrogen before the flowering of soybean and was obviously better than the 6-18 cm lateral 18-24 cm of nitrogen fertilizer.