Effect of peanut mixed cropping with gramineous species on micronutrient concentrations and iron chlorosis of peanut plants grown in a calcareous soil |
| |
Authors: | Yuanmei Zuo Fusuo Zhang |
| |
Institution: | (1) Key Laboratory of Plant Nutrition and Nutrient Cycling, MOA, Key Laboratory of Plant-Soil Interactions, MOE, Department of Plant Nutrition, China Agricultural University, Beijing, China |
| |
Abstract: | 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. |
| |
Keywords: | Peanut Gramineous species Intercropped cropping Micronutrient Phytosiderophore |
本文献已被 SpringerLink 等数据库收录! |
|