Meng Wei-wei, Chu Peng-fei, Yu Zhen-wen, 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. 2011 Oct;22(10):2487-94.
Taking two wheat (Triticum aestivum L.) cultivars Jimai 20 and Taishan 22 as test objects, this paper studied the effects of different irrigation treatments on the water soluble carbohydrate contents in penult stem internode and sheath and the grain yield. Four irrigation treatments were installed, i. e. , no irrigation (W0), irrigation at overwintering and jointing stages (W1), irrigation at overwintering, jointing and anthesis stages (W2), and irrigation at overwintering, jointing, anthesis and filling stages (W3). In treatment W0, the contents of total soluble sugar and of fructan with the degree of polymerization (DP) > or = 4 and = 3 in the penult stem internode and sheath of the two cultivars at early filling stage and the fructose content at later filling stage were the highest, indicating that the accumulation and degradation of water soluble carbohydrate in the penult stem internode and sheath were promoted under no irrigation, which in turn increased the 1000-grain weight. In treatment W1, the contents of fructan with DP > or = 4 and DP = 3 in the penult stem internode and sheath of Jimai 20 at early filling stage, the total soluble sugar and fructose contents at middle and later filling stages, and the grain yield were the highest. In treatment W2, Taishan 22 had the highest contents of fructan with DP > or = 4 and DP=3 in the penult stem internode and sheath at early filling stage, lower fructose content at higher filling stage than in treatment W1, and the highest grain yield. Comparing with Jimai 20, Taishan 22 had higher contents of total soluble sugar and of fructan with DP > or = 4 in the penult stem internode and sheath at early filling stage and higher content of fructose at later filling stage, and lower grain yield in treatments W0 and W1 but higher grain yield in treatments W2 and W3. In this study, treatments W1 and W2 promoted the accumulation and degradation of water soluble carbohydrate in the penult stem internode and sheath of Jimai 20 and Taishan 22, and gained the highest grain yields of the two cultivars, respectively, being most appropriate irrigation treatments for Jimai 20 and Taishan 22, respectively.
以小麦（Triticum aestivum L.）品种济麦20和泰山22为试验对象，研究了不同灌溉处理对倒二茎节间和叶鞘中水溶性碳水化合物含量及籽粒产量的影响。设置了4种灌溉处理，即不灌溉（W0）、越冬期和拔节期灌溉（W1）、越冬期、拔节期和开花期灌溉（W2）以及越冬期、拔节期、开花期和灌浆期灌溉（W3）。在W0处理中，两个品种倒二茎节间和叶鞘在灌浆前期的总可溶性糖、聚合度（DP）≥4和DP = 3的果聚糖含量以及灌浆后期的果糖含量最高，表明不灌溉促进了倒二茎节间和叶鞘中水溶性碳水化合物的积累和降解，进而增加了千粒重。在W1处理中，济麦20倒二茎节间和叶鞘在灌浆前期DP≥4和DP = 3的果聚糖含量、灌浆中期和后期的总可溶性糖和果糖含量以及籽粒产量最高。在W2处理中，泰山22倒二茎节间和叶鞘在灌浆前期DP≥4和DP = 3的果聚糖含量最高，灌浆后期的果糖含量低于W1处理，籽粒产量最高。与济麦20相比，泰山22在灌浆前期倒二茎节间和叶鞘中总可溶性糖和DP≥4的果聚糖含量较高，灌浆后期果糖含量较高，在W0和W1处理中籽粒产量较低，但在W2和W3处理中籽粒产量较高。本研究中，W1和W2处理促进了济麦20和泰山22倒二茎节间和叶鞘中水溶性碳水化合物的积累和降解，分别获得了两个品种的最高籽粒产量，分别是济麦20和泰山22最适宜的灌溉处理。
