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首页> 外文期刊>Plant and Soil >Effect of peanut mixed cropping with gramineous species on micronutrient concentrations and iron chlorosis of peanut plants grown in a calcareous soil
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Effect of peanut mixed cropping with gramineous species on micronutrient concentrations and iron chlorosis of peanut plants grown in a calcareous soil

机译：花生与禾本科混作对石灰性土壤中花生植物微量营养元素含量和铁绿化的影响

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To gain a better understanding of the mechanisms of improvement of iron nutrition of peanut (Arachis hypogaea L.) intercropped with maize (Zea mays L.) in calcareous soil, both greenhouse and field experiments were conducted to investigate the rhizosphere (phytosiderophores) effects from maize, barley, oats and wheat with different phytosiderophores release rates on iron nutrition and other micronutrients in calcareous soil. Six cropping treatments were examined in a greenhouse experiment: peanut grown separately in monoculture, normal peanut/maize intercropping (two genotypes: Danyu13, Zhongdan12), peanut/barley intercropping, peanut/oats intercropping, and peanut/wheat intercropping. Additionally, we investigated in a field experiment the same five cropping systems as the greenhouse experiment (maize/peanut intercropping not including Zhongdan12). Our results show that the chlorophyll and active Fe concentrations in the young leaves of the peanut in the intercropping system with different gramineous species were much higher than those of the peanut in monoculture. In greenhouse conditions, the Fe concentration in the shoots of peanut plants grown in the intercropping systems of two maize genotypes separately were 1.40-1.44, 1.47-1.64 and 1.15-1.42 times higher respectively than those of peanut plants grown in monocropping at 55, 60 and 70 days. In particular, the Fe concentration in shoots of peanut plants grown in the intercropping systems of barley, oats and wheat were not only higher than those in monocropping but also higher than those in peanut intercropped cropping with maize. In the field, the concentration of Fe in shoot of intercropped peanut plants in rows 1-3 from gramineous species were significantly higher than in monocropping at the flowering stage. Simultaneously with iron nutrition variation in peanut, Zn and Cu concentrations of intercropped grown peanut increased significantly compared to those in monocropping in the greenhouse experiment, and different intercropping treatments generally increased the Zn and Cu content in the shoot of peanut in the field. Systemic mechanisms may be involved in adaptation to nutrient stresses at the whole plant level. The study suggests that a reasonable intercropping system of nutrient efficient species should be considered to prevent or mitigate iron and zinc deficiency of plants in agricultural practice.
机译：为了更好地了解钙质土壤中花生与玉米（Zea mays L.）间作的花生（Arachis hypogaea L.）间铁营养改善的机理，进行了温室和田间试验，研究了玉米根际（植物铁载体）的作用。具有不同植物铁载体的玉米，大麦，燕麦和小麦对钙质土壤中铁营养和其他微量营养素的释放速率。在温室试验中检查了六种作物处理方法：单种种植的花生单独种植，正常花生/玉米间作（两种基因型：Danyu13，Zhongdan12），花生/大麦间作，花生/燕麦间作和花生/小麦间作。此外，我们在田间试验中研究了与温室试验相同的五个种植系统（玉米/花生间作不包括中单12）。我们的结果表明，在不同禾本科种间作系统中，花生间作叶中叶绿素和活性铁的含量远高于单作花生。在温室条件下，两种玉米基因型间作系统中生长的花生植物的芽中的铁含量分别比55、60时单季种植的花生植物的铁含量高1.40-1.44、1.47-1.64和1.15-1.42倍。 70天特别地，在大麦，燕麦和小麦的间作系统中生长的花生植物的芽中的Fe浓度不仅高于单作，而且高于玉米与玉米的间作。在田间，禾本科种的1-3行间作花生植物的芽中的Fe浓度显着高于开花期的单作。同时，随着花生铁营养的变化，间作花生的锌和铜含量比温室试验中的单作显着增加，而且不同间作处理通常会增加田间花生芽中锌和铜的含量。系统机制可能参与了整个植物水平对营养胁迫的适应。研究表明，在农业实践中，应考虑使用合理的营养高效种间作系统，以预防或减轻植物中铁和锌的缺乏。

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