大豆科学2007，Vol.26Issue(4)：528-532,5.
大豆不同生殖生长期干旱胁迫条件下施磷对根系形态性状的影响
Effect of Phosphorus Application on Morphological Characters of Root Under Drought Stress at Different Reproductive Stages in Soybean
摘要
Abstract
Application of phosphorus (P)fertilizer is an important factor for improving the tolerance to water deficit in many plants. A pot experiment was conducted to identify the effects of P application on soybean adaptability to water deficit at the R1 (initial flowering) and R4 (full pod) stages through the investigation of root morphological traits and resultant yield in a soybean (Glycine max L. Merrill) cultivar (Dongnong 434). The four levels of P application were 0,7. 3,14. 6 and 29.2 mg kg-1 soil,respectively. The three soil moisture treatments were (1) 65%～75% of field water capacity (FWC) as control, (2) 30%～40% of FWC at the R1 stage,and (3) 30%～40% of FWC at the R4 stage. Results showed that root traits andyield were significantly reduced by drought stress at different growth stages, especially at the R4 stage. Application of P enabled to alleviate the adverse effects of drought, to increase the root dry weight, root length, root surface area and consequently yield.关键词
大豆/水分胁迫/施磷量/根系性状/产量Key words
Soybean/Water Stress/Phosphorus application/Root traits/Yield分类
农业科技引用本文复制引用
申忠宝,齐志勇,金剑..大豆不同生殖生长期干旱胁迫条件下施磷对根系形态性状的影响[J].大豆科学,2007,26(4):528-532,5.基金项目
国家教育部大豆生物技术重点实验室主任基金项目(S13051302) （S13051302）
