| Effects of mulching patterns on soil temperature, soil moisture and yield of potato |
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| DOI：10.7606/j.issn.1000-7601.2017.06.09 |
| Key Words: potato mulching cultivation pattern soil temperature soil moisture yield |
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| Abstract: |
| The paper studied the effects of mulching patterns on soil moisture, soil temperature, yield, and economic returns of potato cultivation in Gansu Dingxi, using Longshu6 as test material. The results showed that the average temperature in 0～30 cm soil layer under whole plastic-film mulching on double ridges and ridge side planting and whole plastic film mulching on big ridge and ridge furrow side planting were 2.2℃ and 2.5℃ higher than that of the control, respectively. In contrast, the temperature in 0～30 cm soil layer under bundled straw covering was 1.0℃ lower than that of the control. Besides, the plastic film mulching and bundled straw covering treatments improved soil moisture in the potato growing period, especially early growth of potato. The average soil moisture content in 0～100 cm soil layer under whole plastic-film mulching on double ridges and ridge side planting, whole plastic film mulching on big ridge and ridge furrow side planting and bundled straw covering were 2.6%, 2.2% and 1.6% higher than that of the control at emergence stage, respectively. The vertical variation of soil temperature and moisture content in each treatment decreased with the increase of soil depth. Compared with the control, potato yield with whole plastic-film mulching on double ridges and ridge side planting, whole plastic film mulching on big ridge and ridge furrow side planting and bundled straw covering significantly increased by 33.6%, 28.6% and 23.2% respectively. The total net income with whole plastic-film mulching on double ridges and ridge side planting was the highest, followed by the bundled straw covering technique, and the total net income increased by 7 201.56 yuan·hm-2 and 5 996.04 yuan·hm-2 respectively compared to the control. Therefore, whole plastic-film mulching on double ridges and ridge side planting can not only effectively increase soil temperature but also improve soil water content, thus considered to be efficient planting pattern for potato production in Gansu Dingxi. |
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