Chu Peng-Fei, Yu Zhen-Wen, Wang Dong, Zhang Yong-Li, Xu Zhen-Zhu
Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Cultivation, Shandong Agricultural University, Tai'an 271018, Shandong, China.
Ying Yong Sheng Tai Xue Bao. 2009 Nov;20(11):2691-8.
Field experiments were conducted in Tai' an and Yanzhou of Shandong Province in 2004-2005 and 2005-2006 to study the effects of irrigation stage and amount on the accumulation and translocation of fructan in winter wheat penult stem and sheath after anthesis and the water use efficiency. No irrigation in whole growth period promoted the translocation of fructan from penult stem and sheath to grain at late grain-filling stage. Irrigation with 60 mm water at jointing and anthesis stages increased the flag leaf photosynthetic rate and photo-assimilate accumulation after anthesis, and the contribution of the photo-assimilates to the grain. Irrigation with 60 mm water at jointing, anthesis, and grain-filling stages, and with 90 mm water at jointing and anthesis stages decreased the flag leaf photosynthetic rate at late grain-filling stage, increased the photo-assimilate accumulation before anthesis and the contribution of the photo-assimilates to the grain, and reduced the translocation of the photo-assimilates after anthesis to the grain. Excessive irrigation also increased the contents of fructan with the degree of polymerization (DP) > or = 4 and = 3 in penult stem and sheath at late grain-filling stage, limiting the translocation of fructan from penult stem and sheath to grain. Irrigation with 60 mm water at jointing and anthesis stages led to a higher grain yield and the highest water use efficiency, while irrigation with 60 mm water at jointing, anthesis, and grain-filling stages, and with 90 mm water at jointing and anthesis stages had little effects on the grain yield but decreased the water use efficiency.
2004—2005年以及2005—2006年在山东省泰安市和兖州市开展了田间试验，以研究灌溉时期和灌溉量对冬小麦倒二茎和叶鞘花后果聚糖积累与转运以及水分利用效率的影响。全生育期不灌溉促进了灌浆后期果聚糖从倒二茎和叶鞘向籽粒的转运。拔节期和开花期灌溉60毫米水提高了旗叶光合速率以及花后光合产物积累量，且光合产物对籽粒的贡献率增加。拔节期、开花期和灌浆期灌溉60毫米水以及拔节期和开花期灌溉90毫米水，降低了灌浆后期旗叶光合速率，增加了花前光合产物积累量以及光合产物对籽粒的贡献率，减少了花后光合产物向籽粒的转运。过量灌溉还增加了灌浆后期倒二茎和叶鞘中聚合度（DP）≥4和≥3的果聚糖含量，限制了果聚糖从倒二茎和叶鞘向籽粒的转运。拔节期和开花期灌溉60毫米水使籽粒产量较高且水分利用效率最高，而拔节期、开花期和灌浆期灌溉60毫米水以及拔节期和开花期灌溉90毫米水对籽粒产量影响较小，但降低了水分利用效率。
