Lotus Seed Extract,Semen Nelumbinis Extract,Lotus Seed Extract For Nutrition,Lotus Seed Extract For Food NANJING ZELANG MEDICAL TECHONOLOGY CO., LTD , https://www.hawfitness.com
(2) Fertilizer demand: The requirement of fertilizer for cowpea is similar to that of kidney bean, and the requirement for fertilizer is not high. In the early stage of plant growth (crust stage), because the nodule has not yet fully developed, the nitrogen fixation capacity is weak, and appropriate amount of nitrogen fertilizer should be supplied. After flowering and scabbing, the plant uptake of phosphorus and potassium increased rapidly and the rhizobia increased. This period due to vegetative growth and reproductive growth, the demand for a variety of nutrients increased, can be combined with nitrogen, phosphorus, potassium compound fertilizers, regulate the rational distribution of photosynthetic products.
According to experiments, cowpea needs the most phosphorus fertilizer, followed by potassium fertilizer, and nitrogen fertilizer least. In the early stage of fertility, water and fertilizer should be properly controlled, nitrogen fertilizer should be reduced, and phosphorus and potassium fertilizers should be added to make it stable and stable.
Kidney bean root absorption characteristics and dynamics
(1) Root absorption characteristics: The root system of cowpea is more developed, but the regeneration ability is weaker. The main root is about 80 to 100 cm deep. The root group is mainly distributed in the 15-18 cm plough layer. The lateral roots are rare, the root nodule is less, and the nitrogen fixation ability is poor. The roots have strong water absorption capacity and drought tolerance, but they are jealous. It has a wide adaptability to soil, but it is suitable for fertile, well-drained, well-breathed loam or sandy loam, suitable for pH 6.2-7.0. Too viscous and low-humidity soils have a negative root growth and nodule activity.