Abstract:

To clarify the effects of plastic film and straw mulching on the yield and quality of winter potato and weed control, and provide reference for high efficiency cultivation of winter potato, ‘Favorita’ and ‘Minshu 1’ were selected as materials, four different mulching treatments were conducted in field condition, and the difference of yield and nutritional quality of winter potato, and the control efficiency of weed were analyzed. The results showed that, compared with the open field cultivation (CK), the yield of commercial potato under plastic film mulching and rice straw mulching were increased by 3.2%-15.8% and 13.7%-30.9% respectively, and the total yield were increased by 3.2%-18.1% and 14.8%-21.9%, respectively. Compared with CK, the contents of starch under black film mulching were significantly increased by 15.9%-19.3%. Black film and rice straw mulching were benefit to improve the content of vitamin C, which was increased by 10.1%-39.6% and 26.7%-36.1%, respectively. The weeds were obviously inhibited by mulching, and the fresh weight of weed under black film, white film and rice straw mulching were decreased by 66.4%-77.6%, 32.4%-34.5% and 25.9%-37.4%, respectively, compared with the CK, and the black film mulching had the best control effect. In conclusion, plastic film mulching and rice straw mulching are helpful to improve the potato yield, and the black film mulching is also beneficial to improve tuber quality and has obvious control effect on weed.

Key words: potato, plastic film, rice straw, yield, quality, weed control