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| DOI： |
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| Impact of Ridging with Full Plastic-film Mulching on Soil Water,Enzymatic Activities and Yield of Rain-fed Potato |
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SUN Mengyuan, LIU Jinghui, ZHAO Baoping, YANG Yanming, MA Bin, ZHANG Xinglong, XU Chang
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Agricultural College, Inner Mongolia Agricultural University, Huhhot 010019, China
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| Abstract: |
| Experiments involving four planting treatments: double ridgingwith full film mulching (A1), single ridging with full film mulching (A2), single ridgingwith full film mulching by planting potato in a micro-furrow channel (A3), and conventional planting (CK), were conducted to investigate their impact on soil water, enzymatic activity and potato yield in a rain-fed field. The results showed that water content in 0~100 cm was improved in all treatments with mulching and ridging, especially in 0~20 cm, compared to the CK. During the tuber-formation and tuber-expansion periods, soil water content in 0~100 cm under A1, A2 and A3 increased by 27.93%, 19.23%, 34.93% and 25.12%, 26.94%, 57.00% respectively, in comparison with the CK. The activity of sucrose, urease, catalase and phosphatase in 0~60 cm under ridging with full filming also increased significantly, especially in 0~10 cm. As the potato grew, the enzymatic activity first increased and then decreased, peaking at the tuber-expansion period. The yield under ridging with full film mulching increased considerably in order of A3>A1>A2>CK.In particular, the yield in A3 was 5.53% and 14.23% higher than that in A2 and A1 respectively. In comparison with the CK, the yields of A1, A2 and A3 increased by 75.77%, 66.56%, 53.88% respectively. Compared with the traditional planting treatment, ridging with full filming not only improved yield, but also reduced the rotten rate and green potato rate. Single ridging with full film mulching by planting the potato in a small channel (i.e., A3) was most effective, offering a water-saving cultivation for dryland in the loess plateau of Inner Mongolia. |
| Key words: potato; enzyme activity; water content; yield |
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