Study on the Present Condition and the Potentialities of the Productivity of Main Tree Species Forest Plantation of ChinaⅠ.Study on the Forest Plantation Productivities of Cunninghamia lanceolata and Pinus massoniana

The present conditions and the potentialities of forest plantation productivities of Cunninghamia lanceolata and Pinus massoniana, with different ownerships and different mangement intensities.were studied.The results showed:(1)The present productivities of the collective ownership and the state owned forest plantation are 11%～18% and 20%～40%.(2)In normal management state,the productivity of the collective ownership forest plantation will be raised over 70% based on its present productivity,and the state owned forest plantation will be raised by 40%.(3)In intensive management, Cunninghamia lanceolata forest plantation will be 50% of the climatic productivity,and Pinus massoniana will be 80% of the climatic productivity.(4)In using good strain and scientific cultivating,the productivity of the state owned plantation will be raised over 80% based on its present productivity.(5)In the same management condition,the productivity of Pinus massoniana stand is 20% higher than that of Cunninghamia lanceolata.