【摘要】 以单作马铃薯(中晚熟品种)为对照,设置2:2和3:2两种薯玉行比,研究薯/玉套作模式对马铃薯干物质生产特性及产量的影响。结果表明:整个生育期马铃薯叶茎干物质积累均呈上升趋势,套作呈慢-快-慢的特点,单作呈前慢后快的特点。马铃薯叶、茎干物质积累量和干物质总量向叶茎的分配量生育前期套作均高于单作,生育后期套作均低于单作;向块茎的分配量生育前期套作低于单作,生育后期套作高于单作。干物质向块茎的分配呈上升趋势,向叶的分配呈下降趋势,向茎的分配呈先升后降趋势,向块茎分配的上升幅度和向叶茎分配的下降幅度套作均大于单作。叶、茎与块茎干物质积累量套作2:2行比低于套作3:2行比。总之,套作虽降低了马铃薯干物质积累,却促进了干物质向块茎的分配;套作降低了马铃薯块茎产量,但2:2行比与3:2行比薯/玉套作模式LER分别为1.19和1.05。这说明,套作具有产量优势,2:2行比模式套作优势更强,在生产中宜优先推广应用。更多还原

【Abstract】 Dry matter production characteristics and yield of potato in potato/maize intercropping system were studied in a field experiment,the sole crop potato(a late maturing variety) as contro1.Two potato to maize ratios were employed,2:2 meaning two rows of potato plus two rows of maize while 3:2 meaning three rows of potato together with two rows of maize.The results showed an increase of accumulation of stem and leaf at the growth stages of potato,with a character of slowing initially and quickening lately in sole condition while a character of slow-fast-slow in intercropping condition.In addition,intercropping led to enhancement of dry matter accumulation of stem and leaf in early growth stages and decline in late growth stages.For the distribution of dry matter to stem and leaf the same trends was observed as the accumulation of dry matter while to tuber it changed in opposite direction.Moreover,at the growth stages an upward trend to tuber and a downward trend to leaf and fluctuations in stem were detected,with less amount under intercropping condition than sole cropping.Furthermore,dry matter of leaf,stem and tuber accumulated less in 2:2 ratio than in 3:2 ratio treatment at the growth stages.In summary,intercropping led to decreased accumulation of dry matter and increased allocation to tuber and dropped tuber yield,however the LER were 1.19 and 1.05 in 2:2 ratio and in 3:2 ratio treatment,respectively,which suggested that intercropping prevailed as well as 2:2 ratio treatment,and 2:2 ratio intercropping system could be prior to 3:2 ratio treatment in the production.更多还原