施肥对蚕豆根瘤及产量的影响

针对冀北蚕豆主产区,研究了不同施肥处理对蚕豆根瘤及产量的影响。研究表明,磷钾肥可以促进根瘤的形成;在盛花期,根瘤的数量和干重随着施氮水平的增加呈先增加后减少的趋势,且N60施氮水平时根瘤的数量（56.0个/株）和干重（0.121g/株）值最高,分别比对照增加了46.6%和49.4%;在成熟期,根瘤数量和干重均随着氮肥的增加整体呈降低趋势,氮肥抑制根瘤的形成。施用磷钾肥和氮磷钾肥处理干物质积累量均高于对照处理。适量的氮肥与磷钾肥配施可促进蚕豆根、茎、叶、子粒的生长,过多的氮肥则会抑制植株

Nodules and Yield of Faba Bean under Different Fertilizer Treatments

The effects on the nodules and yield of faba bean under different fertilizer treatments was studied in the main faba bean production area, the northwest of Hebei Province. The results showed that P-K fertilizer could promote the formation of nodule. During the flowering period, the number of nodule and dry weight were increased at first and then decreased with the increase of N fertilizer application levels. The number of nodule (56.0 number/plant) and dry weight (0.121g/plant) of N60 were the highest, increased by 46.6% and 49.4%, respectively over the control. At maturity, the number of nodule and dry weight were decreased gradually with the increase of N fertilizer, which inhibited the formation of nodule. Both the application of P-K fertilizer and N-P-K fertilizer the dry matter accumulation were higher than the control treatment. An appropriate amount of N fertilizer combined with P-K fertilizer can promote the growth of roots, stems, leaves, and grains. Excessive N fertilizer could inhibit the growth of plants. Under the test conditions, N 60kg/hm ², P₂O₅ 60kg/hm ² and K₂O 75kg/hm ² were the best combination, and obtained the highest yield of faba bean.