钟雄, 王硕, 包立, 张乃明, 刘大会, 夏运生, 李佳华. 间作作物菌根菌丝对红壤磷形态的影响[J]. 中国生态农业学报(中英文), 2018, 26(11): 1624-1633. DOI: 10.13930/j.cnki.cjea.180407
引用本文: 钟雄, 王硕, 包立, 张乃明, 刘大会, 夏运生, 李佳华. 间作作物菌根菌丝对红壤磷形态的影响[J]. 中国生态农业学报(中英文), 2018, 26(11): 1624-1633. DOI: 10.13930/j.cnki.cjea.180407
ZHONG Xiong, WANG Shuo, BAO Li, ZHANG Naiming, LIU Dahui, XIA Yunsheng, LI Jiahua. Effects of intercropping and AMF inoculation on phosphorus forms in red soils[J]. Chinese Journal of Eco-Agriculture, 2018, 26(11): 1624-1633. DOI: 10.13930/j.cnki.cjea.180407
Citation: ZHONG Xiong, WANG Shuo, BAO Li, ZHANG Naiming, LIU Dahui, XIA Yunsheng, LI Jiahua. Effects of intercropping and AMF inoculation on phosphorus forms in red soils[J]. Chinese Journal of Eco-Agriculture, 2018, 26(11): 1624-1633. DOI: 10.13930/j.cnki.cjea.180407

间作作物菌根菌丝对红壤磷形态的影响

Effects of intercropping and AMF inoculation on phosphorus forms in red soils

  • 摘要: 丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)在植物与土壤系统中扮演着重要的角色,能促进寄主植物对养分尤其是磷(P)的吸收。间作在提高土壤P素利用及增产增收等方面具有重要作用。本研究通过三室隔网分室盆栽模拟试验,在玉米/大豆间作种植体系下,对菌丝室进行不同形态P处理不施P(P0)、施用无机磷(IOP50)、施用有机磷(OP50),同时在根室进行不同AMF处理不接种(NM)、接种Funneliformis mosseae(FM),研究了不同外源形态P添加和AMF处理下,菌根作物对菌丝室红壤中不同形态P吸收利用的影响。结果表明:与单作-FM-IOP50处理相比,间作-FM-IOP50处理下的玉米P吸收量显著增加150.2%,大豆P吸收量增加24.5%;除大豆单作-P0处理外,接种FM均明显降低菌丝室土壤有效磷含量。除大豆单作-FM处理外,施用IOP50使土壤有效磷含量在单作条件下最高,而在间作条件下则最低。对红壤P形态的分级结果表明,接种AMF均一定程度增加了Ca2-P、Al-P、Org-P、O-Al-P、Ca10-P的含量,而间作则显著提高了作物对土壤Ca2-P、Fe-P的吸收;相比其他处理,土壤Ca2-P、Org-P、O-Al-P含量在间作-FM-IOP50组合处理下较高(P < 0.05)。相关分析显示,Ca2-P与玉米植株P吸收量呈显著负相关,而O-Al-P与大豆植株P吸收量呈显著负相关。总之,接种FM、磷肥施用与间作均在一定程度上促进了宿主作物对P的吸收累积。其中间作-FM-IOP50组合是促进间作玉米生长、P素吸收及Ca2-P、Org-P、O-Al-P增加的最佳组合,通过促进无机磷的活化而改善作物对P素的吸收利用,有效削减土壤P素的残留,若将其应用于滇池流域,可望减少P素的流失。

     

    Abstract: Arbuscular mycorrhizal fungi (AMF) can help host plants in the uptake of nutrients, especially phosphorus (P). Intercropping also can promote use efficiency of P in soils and increase crop yield. In order to study the effects of different P additions and AMF treatments on the absorption and utilization of different forms of P of intercropping corps in red soils, a pot simulation experiment was conducted using the three-compartment method. Under maize-soybean intercropping system, the hyphal compartments were treated with different forms of P-no P (P0), inorganic P (potassium dihydrogen phosphate-IOP50) and organic P (soy lecithin-OP50). Different AMF treatments, including no AMF (NM), inoculation with Funneliformis mosseae (FM), were performed in the root chamber. Intercropped maize and soybean, mono-cropped maize and soybean were planted in the experiment. The results showed that compared with mono-cropping-FM and IOP50 treatment, P uptake in maize increased by 150.2% and P uptake in soybean increased by only 24.5% under intercropping-FM and IOP50 treatment. Except mono-cropped soybean and P0 treatment, FM inoculation significantly decreased available P content in hyphal compartment soils. In addition to soybean mono-cropping-FM treatment, IOP50 application yielded the highest soil available P content under mono-cropping, and the lowest under intercropping conditions. AMF inoculation increased the contents of Ca2-P, Al-P, Org-P, O-Al-P and Ca10-P to a certain extent, while intercropping significantly increased crop uptake of Ca2-P and Fe-P in the soil. Under combined intercropping, FM and IOP50, the contents of Ca2-P, Org-P and O-Al-P in the soil were higher (P < 0.05) compared with other treatments. Correlation analysis showed that Ca2-P was significantly negatively correlated with P uptake in maize, while O-Al-P was significantly negatively correlated with P uptake in soybean. In conclusion, FM inoculation, P fertilizer application and intercropping all promoted P absorption and accumulation of host crops to a certain extent. Among these, FM, IOP50 and intercropping was the best combination for the promotion of intercropped maize growth, P uptake and increased Ca2-P, Org-P and O-Al-P of red soil. If applied to Dianchi watershed, it is expected to reduce the loss of P.

     

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