【作者】 赵秀芬；

【导师】 张福锁；

【作者基本信息】 中国农业大学 ， 植物营养学， 2004， 硕士

【摘要】 中国缺锰土壤面积很大，作物缺锰特别是麦类作物缺锰在全球石灰性土壤上仅次于缺铁。植物种间相互作用能够影响微量元素的吸收，进而在一定程度上改善作物的微量元素营养。基于以上理论，本研究采用盆栽试验探讨了在不同的种植方式下(间、混作和轮作)，燕麦、油菜、鹰嘴豆对小麦生长及锰营养的影响。研究结果表明： 在缺锰土壤上，施用锰肥显著改善了小麦、燕麦和油菜的锰营养，鹰嘴豆受锰肥影响较小。 整体来看，在本试验条件下的小麦／燕麦种植体系中，根系分隔方式对小麦地上部生物量的影响不明显；而且，不论是混作还是轮作，燕麦对小麦锰营养的改善作用均不显著。 在本试验条件下，小麦与油菜或鹰嘴豆混作能显著改善小麦的生长及锰营养，其地上部干重及吸锰量均以根系不分隔处理显著高于根系完全分隔处理；油菜和鹰嘴豆的生长受小麦抑制，均表现为不分隔处理的地上部干重及吸锰量显著低于完全分隔。小麦／油菜种植体系的总生物量不受根系分隔方式的影响，但总吸锰量以根系不分隔处理较低；小麦／鹰嘴豆种植体系的总生物量以根系不分隔处理的最高，而总吸锰量在不同根系分隔方式间无显著差异。更多还原

【Abstract】 The area of Mn- deficiency soil is large in China. Mn-deficiency in agricultural crops, especially in wheat plants, is secondly to Fe-deficiency in calcareous soils of the world. Interspecific interactions can affect micronutrients uptake. Thus pot experiments were conducted to investigate the effects of oat, rape and chickpea on Mn nutrition of wheat in intercropping system or in oat-wheat rotation. The main results were as follows:Soil applications of Mn fertilizer significantly improved Mn nutrition of wheat, oat, rape and chickpea in Mn-deficient soil.In the wheat-oat intercropping system, root barriers had no effects on shoot dry weight of wheat, and Mn nutrition of wheat was not improved by the oat-wheat rotation as well.Wheat was the dominating crop in aspects of both the growth and Mn nutrients competition either in wheat-rape or in wheat-chickpea intercropping system, but the growths of rape and chickpea were suppressed by wheat. Root barriers did not affect the total shoot dry weight in wheat-oat system, but the total Mn uptake was lower in no barrier treatment (mixed cropping) than in solid barrier treatment (mono cropping). The total shoot dry weight was highest in no barrier treatment but the total Mn uptake was not significantly different among three root barrier treatments (no barrier, mesh barrier and solid barrier) in wheat-chickpea intercropping system.In general, the results from the present study revealed that wheat growth and Mn nutrition can be improved by wheat-rape and/or wheat-chickpea intercropping systems through interspecific interaction. As a consequence, the growth of intercropped rape or chickpea was inhibited compared with the mono rape or chickpea, respectively.更多还原