中国生态农业学报2012，Vol.20Issue(4)：433-439,7.DOI:10.3724/SP.J.1011.2012.00433
植物多糖类复合制剂对冬小麦光合特性及籽粒灌浆进程的影响
Effects of plant polysaccharide compound agents on winter wheat photosynthetic characteristics and grain filling processes
摘要
Abstract
Chlorophyll content, nitrate reductase activity, photosynthetic characteristics and grain-filling processes of winter wheat were investigated in a field experiment for the effects and mechanisms of three plant polysaccharide compound agents [PI (plant polysaccharide extracted from natural plant and marine biological resources), P2 (plant polysaccharide/5-aminolevulinic acid) and P3(plant polysaccharide/5-aminolevulinic acid/dimethylpiperidinium chloride)]. The effects of agents on the growth and grain yield of winter wheat after foliage spraying at early flowering stage were determined. The results indicated that the agents increased SPAD values in flag and top second leaves. It delayed the decrease of chlorophyll content as plants development. Net photosynthetic rates of flag leaves increased by 8.7%~17.4%. Increases in SPAD and photosynthetic rate under P1 and P2 treatments were larger than those under P3 treatment. Furthermore, nitrate reductase activities increased under P1 and P2 treatments and water use efficiency (WUE) of flag leaves increased in excess of 10%. Under the compound agent treatments, the period until maximum grain-filling rate shortened by 1.3~4.2 d. Mean grain-filling rates increased by over 6% under P1 and P2 treatments. While no obvious change was noted in meangrain-filling rate under P3 treatment, grain-filling duration lengthened by 1.0 d. Whereas there was no significant change in spike number, grain number per spike and kilo-grain weight improved. Grain yield of winter wheat treated with compound agents increased by over 8% compared to the control treatment. Chlorophyll content increase, leaf senescence delay, and enhanced photosynthetic capacity and grain-filling processes improved winter wheat yield under polysaccharide compound agent treatments.关键词
植物多糖类复合制剂/冬小麦/气体交换参数/叶绿素SPAD值/产量/水分利用效率/灌浆速率Key words
Plant polysaccharide compound agent/Winter wheat/Gas exchange parameter/Chlorophyll content/Grain yield/Water use efficiency/Grain-filling rate分类
农业科技引用本文复制引用
白文波,宋吉青,吕国华,国金义,刘星海,李际会..植物多糖类复合制剂对冬小麦光合特性及籽粒灌浆进程的影响[J].中国生态农业学报,2012,20(4):433-439,7.基金项目
中央级公益性科研院所基本科研业务费(BSRF201002)和国家"十二五"高技术研究发展计划(863计划)项目(2011AA100503)资助 （BSRF201002）
