干旱地区农业研究2012，Vol.30Issue(2)：137-144,8.
播种期对农牧交错带马铃薯生长发育和产量形成及水分利用效率的影响
Effect of sowing date on the growth and yield formation and water use efficiency of potato in Agro-pastoral Ecotone
摘要
Abstract
In order to study the effects of different sowing dates on the growth, development, yield formation and water use efficiency (WUE) of potato and provide a scientific basis for optimal sowing date and high yield of potato in A-gro-pastoral Ecotone, phenology, morphological index, yield formation and WUE of potato under five sowing-date treatments of SE( April 28) , E(May 8) , M(May 18), L(May 28) and SL(June 8) were compared using randomized block design based on a field experiment in WuChuan county. The results showed that phenology, plant height and leaf area index (LAI) were significantly different under different sowing dates. The growing period of potato was shortened at a rate of 6 days averagely with the sowing date postponed by 10 days, whilst the ratio of the reproductive stage in growing period was increased, which reached 45 % and 59 % respectively under SE and SL treatments. Aboveground dry matter accumulation under SE and E treatments were significantly lower than that of other sowing dates. In the whole period, the fresh tuber weight increased as the Logistic growth curve. Total yield and yield of big potato as well as the number of big potatoes in all were significantly different. The difference of yield between M, L and SL treatments was not significant and their averaged yield reached 21 593 kg/hm2, while there were also no significant difference in yield between SE and E treatments, reached 15 181 kg/hm2 averagely. WUE increased as the sowing date delayed. The highest value and the lowest value of WUE occurred under SE and SL treatments, which were 45.2 kg/(hm2"mm) and 86.3 kg/(hm2-mm) respectively. The appropriate sowing date of potato in Agro-pastoral Ecotone was recommended to be arranged in middle-late May.关键词
播种期/生育期/产量构成/水分利用效率/马铃薯Key words
sowing date/ phenology/ yield formation/ WUE/ potato分类
农业科技引用本文复制引用
沈姣姣,王靖,潘学标,冯利平,赵沛义,陈辰..播种期对农牧交错带马铃薯生长发育和产量形成及水分利用效率的影响[J].干旱地区农业研究,2012,30(2):137-144,8.基金项目
中间农业大学基本科研业务费项目(2009JD32,2010JS114) （2009JD32,2010JS114）
中国农业大学-内蒙古农业大学科研合作基金 （）
