Estimation on the Economic Benefit of Afforestation by Dipping the Seedling Roots into Slurry with Plant Stress-resistance Agents(IV)——Estimation of Inputs and Outputs

Dipping the seedling roots into slurry which contains the stress resistant chemical agents is an effective way in afforestation.In our previous studies,we carried out the cost accounting,output analysis,and benefits estimation of the chemical agents.In this paper,we examined the benefits of inputs and outputs. The results showed indices that could be used to analyze of inputs and outputs were technical contribution ratio,output to input ratio,rate of return,and payback period of investment.Technical contribution rates of total output value were NPARPA,and Pinus tabulaeformisPlatycladus orientalis.Technical contribution rates of the total benefit in the first year in Mizhi County and Linyou County were NPARPA,in Baota County were NPARPA.In the third year,technical contribution rates of total benefit were NPA RPA,and Pinus tabulaeformisPlayctadus orientalis.Statistical input to output ratio of Platyctadus orientalis was more than Pinustabulaeformis,and NPARPAcontrol.Input to output ratios of economic benefit were controlRPANPA,but their coefficients were controlRPANPA.In the first year,inputto output ratio of economic benefit was Pinus tabulaeformisPlatyctadus orientalis,and in the third year,Pinus tabulaeformisPlatyctadus orientalis.The rates of return on investment were NPARPA.In the first year,the rate of return on investment of Pinus tabulaeformis was more than Platyctadus orientalis,in the third year,Platyctadus orientalis was more than Pinustabulaeformis.The recovery period of using chemical treatment was significantly shorter than the control.