豆科禾本科间作促进磷高效吸收利用的地下部生物学机制研究进展

磷是不可再生资源,磷素营养的高效利用一直是人们关注的热点。豆科禾本科间作可提高土壤磷有效性、改善作物磷营养而提高作物生产力。近年来,相关机理研究越来越深入。本文综述了国内外豆科禾本科间作对土壤磷及作物磷素吸收利用的影响,从作物根系形态、根构型、根系分泌物（质子、低分子量有机酸、磷酸酶）、菌根、根际微生物的角度,阐述了豆科禾本科间作提高土壤磷有效性、促进磷高效吸收利用的机制,对进一步深入理解豆科禾本科种间互作响应磷素的根际过程具有十分重要的意义。最后,从定量化研究及间作群体互作方面对今后的研究方向进行了展望。

Below-Ground Biotic Mechanisms of Phosphorus Uptake and Utilization Improved by Cereal and Legume Intercropping-A Review

Phosphorus(P) is a non-renewable resource, and its highly use efficiency has always been a highlight. The intercropping of legume and cereal could improve crops productivity, which increase the availability of soil P for better crop phosphorus uptake. In recent years, several thorough researches have been conducted to reveal the mechanisms of P use efficiency in intercropping. This paper reviewed the P acquisition and rhizosphere P content in legume and cereal intercropping system. The mechanisms of below ground interaction for P highly use efficiency in intercropping were reported in our review, including root morphology, root architecture, root exudates (proton, low molecular weight organic acid, and phosphatase), mycorrhizal, and rhizosphere microbial assays. The review elaborately reported the mechanism of legume and cereal intercropping increased soil available phosphorus and promoted the phosphorus utilization efficiency, which was helpful to further understand the response of rhizosphere interaction on P status in intercropping system. Moreover, the outlook of further research from qualitative study to community interaction in intercropping was also explained in this paper.