Effects of phosphorus nutrition on P absorption and yields of soybean
A soybean cultivar, Suinong 14, and the sand culture were used to study the effects of phosphorus （P） nutrition levels and without P on P absorption and yield of soybean at different stages. The results show that the promoting role of the higher P nutrition levels on the P concentrations and P absorption of soybean at early and medium stages is obvious, and soybean plant P absorption is increased continually under the increase of P nutrition at the beginning of blooming （ R1 ）. When obvious at the beginning of seeding （ R5 ）. the P level is 51 mg/L, the promoting role of the P nutrition is not When the P levels are from 21 to 31 mg/L, the P concentrations ofleaves and stems are P absorption of the P not increased obviously. When the P nutrition level is 31 mg/L, the promoting role on soybean nutrition is not obvious at the full maturity （R8 ）, and when the P nutrition level is 41 mg/L, the P concentrations of roots are not increased obviously. When the P nutrition level is increased, the soybean yield shows a single peak curve and the yield is the highest when the P nutrition level is 31 mg/L. When the P nutrition level is increased, the kernel number of a plant shows a single peak curve too, and the kernel number is the largest when the P nutrition level is 21 mg/L. the node number are the least, while When the P nutrition level is the lowest （ 1 mg/L）, the kernel number and the weight of 100 seed is the largest. Before the beginning seeding ofsoybean, the P nutrition level is the key factor of forming yield, and after the beginning of seeding, the yield is insensitive to the P nutrition. The node number and kernel number are decreased under no P nutrition during V3 R1 and R1 - R5 stages, while the vegetative of plant is not obviously affected, and the yield and P absorption are decreased obviously. The P concentrations of vegetative, pod skin and seed and P absorption of seed are exclusively affected under no P nutrition during R5 --R7 stages, while the effect on the yield is not obvious.
国家科技期刊平台
NSTL
万方数据
维普
