Study on Physiological Characteristics and Supporting Techniques of Huayu 22 Peanut

Huayu 22 Peanut (Arachis hypogaea L.) belongs to ordinary large variety of peanut with high quality, high yield potential and high stress resistance. Study on nutrition characteristics, stress physiology and supporting techniques of Huayu 22 Peanut is conducive to further developing its application value in breeding and exploiting its high yield potential. Compared with Baisha 1016 Peanut, Huayu 22 Peanut has greater shade tolerance. In weak light, both the leaf area and rate of photosynthesis of Huayu 22 Peanut decline slightly, and damage of chloroplast ultramicrostructure is less, light compensation point and chloroplast a/b are lower, and capturing and utilization efficiency of weak light are higher; after removal of shade, Huayu 22 Peanut plant gets recovered quickly with higher growth compensation effect but slight dropping of yield. Characteristics of N supply for Huayu 22 Peanut at different growth stages are as follows: N supply intensity of root nodule takes on unimodal curve with peak at pod bearing stage. The N supply intensity of soil takes on N shape with higher value at pegging stage and pod filling stage; N supply intensity takes on unimodal curve with peak at pegging stage. At seedling stage and pod filling stage, N is mainly supplied by soil; at pegging stage and pod bearing stage, N is supplied by root nodule. At whole growth stage, root nodule has the largest contribution to N supply, accounting for 50.0%, followed by soil and fertilizer, and the proportion is about 5:3:2. The study established standardized supporting technique for simple cultivation of Huayu 22 Peanut with “single-seed planting, high effective fertilizer application, and three sprays and multi-prevention”.