Potato growth with and without plastic mulch in two typical regions of Northern China
Potato growth with and without plastic mulch in two typical regions of Northern China
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DOI：
10.1016/j.fcr.2008.07.014
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发表时间：
2009-02
影响因子：
5.8
通讯作者：
Fengxin Wang;S. Feng;Xiao Hou;Shaozhong Kang;Jiang-Jiang Han-Jiang
中科院分区：
文献类型：
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作者：
Fengxin Wang;S. Feng;Xiao Hou;Shaozhong Kang;Jiang-Jiang Han-Jiang
地膜覆盖是中国北方地区节水、增产的重要农业措施。2001年和2006年在华北两个典型地区进行了地膜覆盖对滴灌条件下土壤温度、马铃薯生长和蒸散量的影响。结果表明，覆膜处理土壤日平均温度比未覆膜处理高2 ~ 9℃，尤其是在生长早期。华北平原覆盖条件下马铃薯生长受到抑制的主要原因是该地区气温较高，土壤温度也较高。覆盖的负面影响包括出苗率降低和每株可销售的块茎数量减少。覆盖降低了马铃薯的蒸散量和块茎产量，特别是在华北平原。在西北地区，覆盖有利于提高单株巨块茎的重量（W≥300g）。覆盖时间对西北地区马铃薯蒸散量影响不大。但随着地膜覆盖时间的延长，块茎产量和水分利用效率均呈下降趋势，建议尽早拔除地膜。
Plastic film mulching is an important agricultural practice to save water and improve crop productivity in Northern China. Three field experiments were conducted to examine the effect of plastic mulch on soil temperature, potato (Solanum tuberosum L.) growth and evapotranspiration under drip irrigation in two typical regions of Northern China in 2001 and 2006. Results suggest that daily mean soil temperature under mulch was 2–9°C higher than without mulch, especially during the early growth. Potato growth was restrained under mulching conditions in the North China Plain mainly due to the higher air temperature in this region and thus the higher soil temperature. The negative effects of mulching included a lower emergence and fewer marketable tubers per plant. Evapotranspiration and potato tuber yield were both reduced by mulch, especially in the North China Plain. In northwest China, mulch favorably increased the weight of jumbo tubers (W≥300g) per plant. Mulching duration had little effect on potato evapotranspiration in northwest China. However, both tuber yield and water use efficiency (WUE) decreased with increases in mulch duration, which suggests the plastic mulch should be removed early.