陇中旱地马铃薯不同种植模式对土壤温度和水分利用效率的影响

在陇中半干旱区进行了马铃薯7种不同种植模式的比较试验,研究了不同种植模式对耕层土壤温度、土壤含水量、马铃薯产量和水分利用效率的影响.结果表明:高垄覆盖地膜垄沟覆草的增温效果最明显,在8∶00、14∶00和20∶00时的平均土壤温度分别为19.77℃、29.22℃和26.94℃,较传统耕作分别提高了2.17℃、3.44℃和3.18℃;该模式下马铃薯产量和水分利用效率也最高,分别为24 279 kg.hm-2、67.61 kg.hm-2.mm-1,较传统耕作分别提高58.42%、46.03%.

Effects of different planting patterns on soil temperature and water use efficiency of potato in arid regions of Gansu Province

A comparative experiment of seven different planting patterns on potato was conducted in semi-arid area of central Gansu. The soil temperature, soil water, productivity were examined in this study.The result showed that the treatment of high ridge covered by plastic film and ditch covered by grass was the best pattern, it increased soil temperature and commodity rate of the potatoes. Under the pattern, average soil temperature at the time of 8:00,14:00,20:00 were 19.77 ℃,29.22 ℃,26.94 ℃ and increased by 2.17 ℃,3.34 ℃ and 3.18 ℃ compared with the traditional cultivate pattern respectively; and the treatment also got the highest potato productivity and water use efficiency, they were 24 279 kg·hm~(-2) and 67.61 kg· hm~(-2)·mm~(-1)), enhanced by 58.42 % and 46.03 % respectively compared with the traditional cultivate pattern.