Effects of Various Cultivation Mode on Growth and Yield of Potato‘Tianshu No.11' in Mountain Dry Land

In order to explore better cultivation mode of potato Tianshu no.11 suitable for drought resistance and high-yield in mountains and dry lands,the different cultivation models,including open field cultivation and mulching film cultivation,were used to study the growth and yield of potato.The result showed that potatoes cultivated with black plastic mulching can early emergence 4-9d,mature6-12 d,growth period 4-16 dcompared to open field cultivation mulching;potato yield is4 562.33-12 091.04kg/hm2(25.69%-66.77%)higher in the black plastic film mulching cultivation than in the open field cultivation.Double ridge cultivation in black plastic film reached the highest yield,22 968.77kg/hm2,with a yield gain of 12 091.04kg/hm2(increase rate of 66.77%)compared with the open field cultivation yield.Therefore,compared to other cultivation,double ridge cultivation in black plastic film showed better performance on drought resistance,yielding,commodity potato rates,and potato mass per plant,which lead to the highest yield and the highest ratio of output/investment.