Effects of strip mulching and ridge cropping on potato water comsumption characteristics and yield
[Objective]To study the effects of strip mulching and ridge planting on the water consump-tion characteristics and yield of potato at different growth stages,and to establish the high yield mulching culture technology of potato in the semi-arid rain-fed agricultural area of northwest China.[Method]There were 5 treatments:high ridge straw strip mulching(SHH),low ridge straw strip mulching(SLH),plain straw strip mulching(PH),plastic film mulching(HM),and traditional open plain straw as control(CK).[Result]Mulching could significantly improve soil water status.Compared to CK,strip mulching and ridge planting increased the soil water storage by 10.2%and 8.0%respectively.Straw strip mulching and ridge planting reduced water consumption,daily water consumption intensity and water consumption mode coeffi-cient in the early growth stage from seedling stage to tuber formation stage by 5.89%,5.95%and 5.29%,respectively,compared with CK,and increased water consumption,daily water consumption intensity and water consumption mode coefficient in middle and late tuber formation stage to starch accumulation stage.Compared with CK,they increased by 2.93%,2.92%and 3.73%respectively.Compared with CK,the yield,WUE,large potato rate and commercial potato rate of rip-mulching culture with straw strips were sig-nificantly increased by 40.03%,41.15%,53.22%and 23.77%,respectively,and the yield and WUE of po-tato block were SHH>SLH>PH.There were significant or extremely significant positive correlations be-tween potato block yield and water consumption,water consumption intensity and water consumption modu-lus,except for the significant negative correlations between sowing stage and seedling stage and seedling stage and tuber formation stage.[Conclusion]Straw strip mulching and high ridge(SHH)treatment can improve the soil water environment,adjust the water consumption structure of potatoes,balance the contra-diction between supply and demand in the main growth period of potatoes,so as to achieve the purpose of in-creasing production and improving efficiency,and can be used as a recommended model for potato high-yield cultivation in rain-fed agricultural areas in northwest China.
straw strip mulchingsoil water consumption characteristicspotatowater use efficiency
万方数据
维普
