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研究了蔓生和矮生长豇豆的氮磷钾吸收特性。结果表明 ,两类长豇豆对氮磷钾的吸收 ,均以氮最多 ,钾次之 ,磷最少。蔓生类型的吸收比例为 2 .75～ 2 .92∶1∶2 .15～ 2 .75,矮生类型为4 .4 9∶1∶4 .2 1。蔓生类型比矮生类型的吸收量大 ,蔓生类型中白豆角比青豆角稍大。蔓生长豇豆营养生长期的吸收量微少 ,生殖生长期约占总吸收量的 98%。豆荚利用的氮磷钾逐渐增加 ,至结荚后期利用了氮磷的 6 5%～ 70 % ,钾的近 4 0 %。矮生长豇豆在营养生长期的吸收量约占 2 0 % ,生殖生长期约占 80 % ,豆荚只利用氮磷的 35%～ 4 0 %和钾的 30 %左右。
The characteristics of nitrogen, phosphorus and potassium uptake of vine and short-growing cowpea were studied. The results showed that the absorption of nitrogen, phosphorus and potassium of the two types of asparagus bean was the most nitrogen, followed by potassium, phosphorus at least. Absorption ratio of variegated type was 2.75 ~ 2.92: 1: 2.15 ~ 2.75, and dwarf type was 4.49: 1: 4.2. Manifestation type of absorption than the dwarf type of large, white beans in the type of vine is slightly larger than the green beans. Vignal growth cowpea nutrition absorption of the growth period slightly, reproductive growth period accounted for about 98% of the total absorption. Pods use of NPK increased gradually, to the late pod using nitrogen and phosphorus 65% ~ 70%, potassium nearly 40%. Dwarf growth of cowpea absorption in vegetative growth period accounts for about 20%, reproductive growth of about 80%, pods only use 35% ~ 40% of nitrogen and phosphorus and 30% of potassium.