【摘要】 为了充分利用红壤地区的光、温、水资源,提高土地利用率,增产增收,通过田间大区比较试验,对红壤低丘旱耕地宽窄带间作模式综合效应进行了研究,结果表明:主副作物宽窄带间作与传统单作比较,综合效应得到明显的提高,年径流深、年泥沙流失量分别减少69.4%、81.8%,耕作层有机质、全氮、速效磷、速效钾含量分别提高7.1%、9.1%、13.6%、8.1%,主作物玉米株高均值为3.03 m,极显著低于对照;穗行粒数为41.5粒/行,极显著高于对照;穗长、百粒重显著高,玉米季增产75.45 kg/hm2,增产1.7%,与对照差异不显著,各处理分别收获饲料10087.5 kg/hm2、黄豆1270.5 kg/hm2、薯块7668.0kg/hm2;产投比由1.66提高到2.04。更多还原

【Abstract】 In order to sufficiently utilize the sunlight,temperature and water resources in red-soil region,improve land use efficiency,and finally increase both crop yield and income,we studied the comprehensive effects of wide-narrow-band intercropping model of crop in hilly red-soil dryland by a comparative test in field. The results showed that the wide-narrow-band intercropping of main crop and subsidiary crop obtained significantly higher comprehensive effects than the traditional monoculture( the control,CK),for example: the annual runoff depth and annual soil erosion were decreased by 69.4% and 81.8%,respectively; the content of organic matter,total nitrogen,available phosphorus and available potassium in plough layer were increased by 7. 1%,9. 1%,13.6% and 8.1%,respectively; the average plant height of main crop( maize) was 3.03 m,which was extremely lower that of CK;the kernel number per row was 41.5,which was extremely higher than that of CK; the ear length and 100-grain weight were significantly higher; the seasonal yield of maize was increased by 75.45 kg / hm2 or 1.7%,which were not significantly different from those of CK; the yields of fodder,soybean and potato tuber were 10087.5,1270.5 and 7668.0 kg / hm2,respectively,and the input-output ratio was enhanced from 1.66 to 2.04.更多还原