摘要
对膜垄和土垄的降雨量和径流量进行直线回归分析,结果表明,粘土夯实集雨垄临界产流降雨量为2.83 mm,产流后的平均集水效率为24.6%,地膜覆盖集雨垄临界产流降雨量为0.23 mm,产流后的平均集水效率为91.1%.在沟垄微型集雨种植马铃薯试验中,30 cm垄宽膜垄、45 cr垄宽膜垄、60 cm垄宽膜垄、30 cm垄宽土垄、45cm垄宽土垄和60 cm垄宽土垄(沟宽均为60 cm)的经济产量分别比传统耕作高173%、168%、119%、28%、24%和18%,水分利用效率分别比传统耕作高3.98、3.74、2.25、1.10、0.93和0.72 kg·mm-1·hm-2.膜垄种植马铃薯经济产量提高119%～173%,土垄种植马铃薯经济产量提高18%～28%.
Ridges and furrows rainfall harvesting（RFRH）system with plastic film and compacted soil is being promoted to increase the water availability for improving and sustaining agricultural production in northwest China. This system was built by shaping soil surface with alternated ridges and furrows along contours. Employing straight-line regression analysis method, this paper studied the runoff generation characters of mini-size water collection by ridges and furrows in the semiarid area of Loess Plateau and related potato-planting techniques. The results showed that the minimal rainfall necessary to produce runoff was 2.83 mm for the ridges with compacted soil （SM）, and 0.23 mm for those covered with plastic film（MR）, with an average runoff efficiency of 24.6% after runoff occurred for SM, and of 91.1% for MR. The tuber yield of MR30, MR45, MR60, SR30, SR45 and SR60 was increased by 173 %, 168 %, 119 %, 28 %, 24 % and 18 %, respectively, and water use efficiency was increased by 3.98, 3.74, 2.25, 1.10, 0.93 and 0.72 kg·mm^- 1· hm^- 2, respectively, compared to the control（ no ridges）. Ridges covered with plastic film could increase the tuber yield by 119 % - 173 %, while those with compacted soil could increase the yield by 18 % -28 %, compared to the control.
出处
《生态学杂志》
CAS
CSCD
北大核心
2005年第11期1283-1286,共4页
Chinese Journal of Ecology
基金
国家"十五"科技攻关项目(2001BA509B15)
甘肃省水利厅资助项目(2005-51)
关键词
沟垄微型集雨
产流特征
马铃薯
mini-size water collection by ridges and furrows, runoff generation character, potato
作者简介
王琦，男，1969年生，博士研究生。主要从事牧草和作物节水技术的研究。E—mail：wangqi512@sohu．com
通讯作者
