Preventing decrepitude, suitable nitrogen, phosphate and potash fertilizer respectivly will be applied after Oct. according to the growth and the concentration of N, P and K in leaves.

• 6月以前以有机肥、磷肥为主，施以适量速效性氮肥，10月以后应根据植株的生长状况和叶片中N、P、K含量，施用适量的N、P、K肥，防止早衰。