摘要
通过田间试验研究了两种不同的玉米花生间作方式对作物铁的吸收和利用效率的影响。结果表明 ,间作方式Ⅰ (玉米∶花生的行数比例为 6∶10 )和间作方式Ⅱ (玉米∶花生∶玉米的行数比例为 3∶8∶3)对铁的吸收效率比单作分别增加了 6 8.72 %和 97.6 8% ;而铁的利用效率分别比单作降低了 2 3.2 6 %和 2 4 .0 9%。同时间作方式Ⅰ和间作方式Ⅱ的土地当量比分别为 1.18和 1.2 7(LER >1) ,说明间作改善花生铁营养表现出明显的间作优势。间作改善花生铁营养所表现的间作优势主要来自于作物对铁的吸收效率。作物对铁的利用效率为负值 。
The field experiment was carried out to study the effect of peanut intercropped with maize in different two intercropping systems on iron uptake and utilization efficiency of peanut. In compare with monocropping of peanut, the results showed that the iron uptake efficiency of intercropping system Ⅰ (the ratio of maize and peanut was 6∶10 ) and intercropping systemⅡ (the ratio of maize/peanut/maize was 3∶8∶3) increased by 68.72% and 97.68% respectively, but for the iron utilization efficiency decreased 23.26% and 24.09%. The land equivalent ratio of intercropping Ⅰand intercropping Ⅱ were 1.18 and 1.27, respectively (LER>1). It also indicated that improving iron nutrition of peanut intercropped with maize showed remarkable intercropping advantage. The intercropping advantage of peanut and maize was mainly from iron uptake efficiency of crops, but the iron utilization of crops had no contribution to intercropping advantage. The reciprocation of iron uptake and utilization efficiency of crops also had little contribution to intercropping advantage.
出处
《作物学报》
CAS
CSCD
北大核心
2003年第5期658-664,共7页
Acta Agronomica Sinica
基金
国家自然科学基金资助项目 (3 0 170 185 )
