Effects of fertilization application on the content of N, P, K in individual specie of Lucerne/Smooth bromegrass mixed grassland
Effects of N,P and K fertilizers on content of N,P,K in individual species of Lucerne/ Smooth bromegrass mixed grassland under different application rates were studied. The results show that the proper fer-tilization(9. 0~13. 5 g/m2 N,7. 2~12. 0 g/m2 P2O5,12. 0~18. 0 g/m2K2O) could increase the Content of N,P, K in Bromus inermis and Medicago varia cv. Caoyuan NO. 2; N application could increase Bromus inermis' nitrogen content, but it had no significant influence on Medicago's nitrogen content; K application could increase Bromus inermis' potassium content and Medicago's nitrogen content,but it had no significant influence on Medicago's nitrogen content;P application decreased Bromus inermis' nitrogen content,but it had no significant influence on Bromus inermis and Medicago's phosphorus content. P and K application could increase Medicago's nitrogen content;High level K(27 g/ m2 K2O) and P(18. 0 g/m2P2O5) fertilization could reduced the N Content of Bromus inermis. And high level N fertilization (20. 3g/m2 N)could reduced potassium content of Bromus inermis and Medicago varia cv. Caoyuan NO. 2 .
fertilizationLucerneSmooth bromegrassmixture grasslandnutrient element
NETL
NSTL
万方数据
维普
