Optimization Economic Benefits of Plastic Film Mulching on Sunflower

Aiming at optimization economic benefits of plastic film mulching on sunflower, the study investigated the effects of re-used plastic film mulching on sunflower´s economic benefit by compared with new plastic film mulching and bare field in Hetao area, China. The results showed that, (1) compared with bare field, the sunflower´s yield of re-used film mulching increased 9.6 to 15% significantly (P 0.05). (2) Compared with bare field, the input of re-used film mulching was reduced by 5.6 % to 9.4 %, which was 1.6 % to 6.1% lower than that of new film mulching. (3) The output of re-used film mulching was 9.6% to 18.1% significantly higher than that of bare field and 2.5% to 4.9% lower than that of new film mulching. (4) The net income of re-used film mulching was 22590 RMBha-1 to 26914 RMBha-1, obviously increased by 19.6% to 34.4% than that of open field and 0.6% to 2.4% less than that of new film mulching. (5) The ratio of output to input of re-used film mulching was the highest (2.6-3.0), higher than that of new film and open field. So re-used plastic film mulching had significantly increased the economic benefit which is suitable for extending in Hetao area, China.