chlorophyl B
1.The results showed that B,Zn,Mn fertilizers could promote cupplant growth,enforced resistence and enhance forage yield under certain concentrations. Of three trace element fertilizers,B fertilizer could increase leaf area index (LAI),chlorophyl content and forage yield by 7.03%,7.23% and 8.42% respectively in the concentration of 600×10~(-6);
