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,2018,26(11):1624-1633
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
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间作作物菌根菌丝对红壤磷形态的影响
钟雄1,2, 王硕1, 包立1,2, 张乃明1,2, 刘大会3, 夏运生1,2, 李佳华1
1.云南农业大学 昆明 650201;2.云南省土壤培肥与污染修复工程实验室 昆明 650201;3.湖北中医药大学 武汉 430065
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。
关键词:  丛枝菌根真菌(AMF)  间作  玉米  大豆  磷形态  磷吸收  土壤有效磷
中图分类号:S344.2;S513
基金项目:国家自然科学基金项目(41161041,41105756)、云南省科技创新人才计划项目(2015HC018)、院士专家工作站项目(2015IC022)和云南省高新技术产业发展项目(201605)资助
Effects of intercropping and AMF inoculation on phosphorus forms in red soils
ZHONG Xiong1,2, WANG Shuo1, BAO Li1,2, ZHANG Naiming1,2, LIU Dahui3, XIA Yunsheng1,2, LI Jiahua1
1.Yunnan Agricultural University, Kunming 650201, China;2.Yunnan Soil Fertilizer and Pollution Repair Engineering Laboratory, Kunming 650201, China;3.Hubei University of Chinese Medicine, Wuhan 430065, China
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.
Keyword:  Arbuscular mycorrhizal fungi (AMF)  Intercropping  Maize  Soybean  Phosphorus form  Phosphorus uptake  Soil available phosphorus
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