Potato cultivation in the Ningnan mountainous area mainly adopts the cultivation mode of ridge covering and film mulching.However,due to the barrier of the film mulching,rainfall flows directly from the ridge surface to the furrow,resulting in low water utilization and affecting potato yield.To address the problem of low water utilization of natural precipitation in potato production in dryland areas,QS9 was used as the material,and a randomized block experi-ment design was adopted to set up three rain harvesting modes,namely,traditional ridge cover film(CK),rain catchment on the ridge covered by black film(T1)and rain catchment on the ridge covered by water seepage film(T2).The effects of the three rain harvesting modes on potato soil water content,enzyme activity,and agronomic traits of potato as well as potato yield were determined.The results showed that both rain-fed black film and water-permeable film planting meth-ods could increase the soil water content and enzyme activity of the potato soil layer,improve the agronomic properties of potato,and thus increase the yield.The yield of rain-fed black film was the highest,reaching 1 543.16 kg·667 m-2,which was 44.04％higher than CK,and more effective in increasing yield than the water-permeable film.In conclusion,the planting method of rain-fed black film on ridges is superior to that of water-permeable film,and can improve the water uti-lization rate,which provides a practical reference for high-yield and high-efficiency cultivation of potato.
PotatoRainfall-harvestingSoil water contentSoil enzyme activityAgronomic traitYield
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