钼硼对大豆氮磷钾吸收及产量的影响

Effect of molybdenum or boron application on N, P, K absorption and yield in soybean

采用田间小区试验 ,研究了施钼或硼对浙春 3号大豆农艺性状、产量及氮磷钾吸收的影响。结果表明 ,施钼或硼明显促进了大豆干物质积累量的增长和对氮磷钾的吸收 ,促进了大豆株高和底荚高的增长 ,增加了大豆的百粒重、总荚数和单株籽粒重 ,提高了大豆产量。大豆植株 N和 P2 O5 含量鼓粒期之前呈明显下降的趋势 ,鼓粒期之后有所回升 ;K2 O5 含量的波动幅度较大。大豆产量与底荚高和百粒重呈极显著正相关 ,与经济系数呈负相关 ,与株高、单株籽粒重。

The effects of molybdenum (Mo) or boron (B) application on agronomic character, yield and N, P, K absorption of Zhechun No.3 were studied in a field trial. By application of Mo or B, the dry matter accumulation and absorption of N, P, K of Zhechun No.3 were increased, and height of low pod, 100 seed weight, No. of total pods and seed weight per plant were also increased. Thus the yield was greatly improved. The contents of N and K 2O of plants decreased before R 5, but increased after R 5. The changes of P 2O 5 percentage of soybean were unstable. There are very significant positive correlation between height of low pod, 100 seed weight and yield of soybean, and negative correlation between yield and economic index. Yield had some positive correlation with plant height, seed weight per plant, dry matter accumulation and total pods of soybean.