Quantitative analysis of root morphology and phosphorus absorption in wheat and faba bean intercropping system
Quantitative analysis of root morphology and phosphorus absorption in wheat and faba bean intercropping system
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DOI：
10.13287/j.1001-9332.202104.027
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发表时间：
2021-04-15
期刊：
影响因子：
--
通讯作者：
Xiao Jing-xiu
中科院分区：
文献类型：
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作者：
Bai Wen-lian;Zhang Meng-yao;Xiao Jing-xiu
豆科作物与谷类作物间作会影响作物根系的生长。的关系。不同磷水平下间作、根系形态和磷获取的关系尚不清楚。通过田间试验和根箱试验，研究了小麦和蚕豆在不同种植模式（单作小麦、单作蚕豆、单作蚕豆）下产量、生物量、磷吸收和根系形态的变化。种植、W/ F)和不同磷水平。在根箱试验中，根重和根量。小麦间作蚕豆可使地上部比分别提高21.2%和61.5%，而地上部重则降低14.6%。间作小麦（IW）根系磷含量和磷吸收量比MW分别提高了23.8%和12.1%。茎和根都重，根。间作蚕豆的地上部比、总根长和根体积分别比中作提高了16.5%、47.3%、24.0%、3.5%和8.4%，导致间作蚕豆地上部和根部磷含量和磷获取量增加。在田间试验中，IW在分蘖期吸磷量比MW降低8.7%，而拔节期、抽穗期、灌浆期和成熟期吸磷量比MW分别提高40.6%、19.7%、7.8%和12.4%。与MF相比，IF在开花期、结荚期和成熟期的磷素获取量分别下降了9.8%、9.0%和5.2%。偏最小二乘回归分析表明，小麦的根表面积、根体积和蚕豆的根表面积对作物磷素获取的贡献最大。国际米兰。在低磷胁迫下，种植增加了根体积和根表面积，导致了更高的磷吸收。综上所述，低磷胁迫下，种间互作扩大了苗期根土界面区，增加了对磷的吸收，有利于套作后期的优势。
The intercropping of legume and cereal crops could affect crop roots growth. The relation. ship among intercropping, root morphology and phosphorus (P) acquisition under different P levels is still unclear. With field experiments and a rhizo-box experiment, we examined the changes of yield, biomass, P acquisition and root morphology of wheat and faba bean under different planting patterns (monocropped wheat, MW; monocropped faba bean, MF; and wheat and faba bean inter. cropping, W//F) and different P levels. In the rhizo-box experiment, both root weight and root. shoot ratio were increased by 21.2% and 61.5%, respectively, but shoot weight was decreased by 14.6% when wheat intercropped with faba bean. Root P content and P uptake of intercropping wheat (IW) increased by 23.8% and 12.1% when compared to MW. Both shoot and root weight, root. shoot ratio, total root length, and root volume of intercropping faba bean (IF) increased by 16.5%, 47.3%, 24.0%, 3.5%, and 8.4% as compared to MF, respectively, which resulted in higher shoot and root P content and P acquisition of IF. In the field experiment, P uptake by IW decreased by 8.7% at tillering stage, but P acquisition increased by 40.6%, 19.7%, 7.8% and 12.4% at jointing, heading, filling, and maturity stages as compared to MW. By contrast, P acquisition of IF de. creased by 9.8%, 9.0% and 5.2% at flowering, podding, and maturity stages as compared to MF- Partial least squares (PLS) regression analysis showed that root surface area and total volume of wheat and root surface area of faba bean had the greatest contribution to crop P acquisition. Inter. cropping induced higher root volume and root surface area which resulted in higher P acquisition under low P stress. In conclusion, interspecific interaction amplified the root-soil interface zone and increased P uptake at seedling stage under low P stress, which could contribute to the intercropping advantages at later stage.