Abstract: The leaf length,the leaf width and the shoot length were studied under five moisture treatmentswhich were SWC30,SWC45,SWC60,SWC75 and SWC90 treatment of red soil in Spring. The characteristics and content change of N,P and K element in leaves and roots of orange were also compared under those soil water treatments. The result was showed that it was better for leaf growth of orange when soil water treatment was about 75%. There was no difference for N in leaves and roots. But the contents of P and K in leaves were less than that in roots. The appropriate water shortage was advantageous to N cumulation for orange. The content of P in orange leaveshad a positively significant correlationwith soil relative water content( SWC). There was no difference for the content of K in leaves among different SWC treatments.

Key words: Red soil, Water acommodation, Orange, Leaf, Nutrition element

CLC Number: 

• S152.7