欢迎访问《麦类作物学报》编辑部网站

作者	单位
马智健，柳明阳，张志雯，张灵鑫，王曜阔，闫彦菲，张敏，袁智，杨敏，李昊昱，蔡瑞国	(1.河北省作物逆境生物学重点实验室/河北科技师范学院农学与生物科技学院，河北昌黎066600；2.河北科技师范学院后勤与国有资产管理处，河北秦皇岛，066004；3. 河北省昌黎县农业农村局，河北昌黎 066600)

摘要点击次数: 65

全文下载次数: 20

中文摘要:

为明确花后喷施硫肥对冀东地区强筋小麦谷蛋白大聚合体(GMP)形成和面粉加工品质的影响，以强筋小麦品种中麦886和津农7号为供试材料，分析了花后喷施甲硫氨酸(Met)和硫酸铵(S)后强筋小麦籽粒产量、蛋白质含量、GMP含量及其粒度分布和面粉加工品质的变化。结果表明，与喷施等氮的尿素水溶液（CK）相比，喷施Met和S后，中麦886的籽粒蛋白质含量分别提升0.63和0.25个百分点，津农7号的籽粒蛋白质含量分别提高0.64和0.27个百分点；在Met和S处理下中麦886籽粒GMP含量较CK分别增加0.37和0.15个百分点，津农7号则分别增加0.48和0.18个百分点。然而，Met处理导致中麦886和津农7号产量分别下降2.5%和1.9%，S处理则使两个品种的产量下降8.6%和9.2%。花后喷施硫肥促进强筋小麦籽粒中大粒径GMP颗粒的体积、表面积和数目比例的提高。Met处理显著提高强筋小麦蛋白质中高分子量谷蛋白亚基、二硫键和游离巯基的含量；S处理主要增加低分子量谷蛋白亚基、二硫键与游离巯基含量。Met处理可全面优化强筋小麦面团流变学特性，S处理仅对中麦886湿面筋含量和津农7号吸水量有提升作用。综上，花后喷施硫肥虽会导致强筋小麦轻微减产，但通过调控谷蛋白聚合组成明显改善加工品质，其中喷施Met的效果更好。

英文摘要:

In order to clarify the effects of post-flowering spraying of sulfur fertilizer on the formation of glutenin macro-polymer(GMP) and flour milling quality of strong-gluten wheat in Eastern of Hebei Province, the strong-gluten wheat varieties Zhongmai 886 and Jinnong 7 were selected in the present study, and the treatments of spraying of water(CK) and spraying of methanethionine(Met) and ammonium sulfate(S) were set up to analyze the changes of grain yield, protein content, GMP content and grain size distribution, and flour milling quality of strong-gluten wheat after post-flowering spraying of Met and ammonium sulfate(S). The results showed that compared with CK, the protein content of Zhongmai 886 was enhanced by 0.63 and 0.25 percentage points, and that of Jinnong 7 was increased by 0.64 and 0.27 percentage points after spraying Met and S, respectively. The GMP content of Zhongmai 886 kernels was increased by 0.37 and 0.15 percentage points under Met and S treatments, respectively, while that of Jinnong 7 was increased by 0.48 and 0.18 percentage points, respectively. However, Met treatment resulted in a 2.5% and 1.9% decrease in yield for Zhongmai 886 and Jinnong 7, respectively, while S treatment reduced yield by 8.6% and 9.2%. Post-flowering spraying of sulfur fertilizer promoted the increase in the volume, surface area and number ratio of large-size GMP particles in strong-gluten wheat kernels. Met treatment significantly increased the content of high-molecular-weight glutenin subunits, disulfide bonds and free sulfhydryl groups in strong-gluten wheat proteins, while S treatment mainly increased the content of low-molecular-weight glutenin subunits, disulfide bonds and free sulfhydryl groups. Met treatment optimized the rheological properties of strong-gluten wheat doughs across the board, while S treatment enhanced only the wet gluten of Zhongmai 886 and the water absorption of Jinnong 7. In conclusion, the post-flowering spraying of sulfur fertilizer reduced the yield slightly, but it improved the processing quality by regulating the glutenin polymerization composition, in which the spraying of Met had a more prominent improvement effect.

查看全文查看/发表评论下载PDF阅读器

关闭