不同施鉀處理苜蓿對豌豆蚜生長發(fā)育和繁殖的影響

打開文本圖片集

doi：10.11733/j.issn.1007-0435.2025.08.006

Abstract： In order to explore the effects of potassium application on the life parameters of A cyrthosiphon pisum on alfalfa，Medicago satiua‘Gannong No. was used as an experimental material. Four potassium applications were set，wthich were K0（0mg?kg-1. ） K1（30mg?kg-1） ， K2（60mg?kg-1） ）， K3（90mg?kg-1） and no fertilization was set as a control （CK）. At the 6-leaf stage of alfalfa， A . pisum was fed with the 3rd leaf from the top of alfalfa. The growth，development and reproduction of A . pisum were recorded and calculated under different potassium applications.Simultaneously，the nutrients and total polyphenols in the 3rd leaf from the top of alfalfa plants were measured. The result showed that the development period of nymphs was prolonged markedly under the medium potassium treatment （ K2） and CK treatment compared to the other treatments （ P< O.05）.The net reproduction rate，intrinsic rate of increase，and finite rate of increase of adult A . pisum were lower significantly under K2 treatment than those of the other treatments （ ?P<0.05） . The soluble sugar content，total phenol content and carbon-to-nitrogen ratio in alfalfa leaves under K2 treatment were significantly higher than those of the other fertilized applications （ P<0.05; .The soluble protein content in alfalfa leaves under K3 treatment increased significantly （ ?P<0.05 .The correlation analysis indicated that the survival rate， the average daily aphid production per female and the intrinsic growth rate of A . pisum were negatively correlated with the soluble sugar content and the total phenol content of alfalfa leaves significantly.The average daily aphid production per female and the intrinsic growth rate of A . pisum were positively correlated with the soluble protein content. A positive corelation existed between the finite rate of increase and the soluble protein content significantly. The potassium fertilizer increased the ratio of carbon to nitrogen and the content of secondary metabolite in alfalfa leaf，thereby inhibiting the growth，development and fecundity of A . pisum.

Key Words：Medicago sativa;Potassium fertilizer;Acyrthosiphon pisum;Life parameter;Antibiosis

紫花苜蓿（Medicagosatiua）為多年生豆科牧草，一旦建植，多年免耕，其穩(wěn)定的生境易使蟲害滋生。（剩余11263字）