结实期叶面施锌对扬麦16号和扬辐麦2号籽粒不同部位锌含量的影响

文章摘要

.结实期叶面施锌对扬麦16号和扬辐麦2号籽粒不同部位锌含量的影响[J].农业环境科学学报,2013,32(4):.

结实期叶面施锌对扬麦16号和扬辐麦2号籽粒不同部位锌含量的影响

The Effect of Foliar Zn Application at Grain Filling Stage on Zn Content in Grain Fractions of Winter Wheat Yangmai 16 and Yangfumai 2

DOI：10.11654/jaes.2013.04.003

中文关键词: 小麦生物强化锌浓度累积量

英文关键词: wheat biofortification zinc concentration accumulation

基金项目:

摘要点击次数: 2496

全文下载次数: 1918

中文摘要:

增加谷粒特别是人类食用部位胚乳中的锌浓度是当前生物强化领域一个挑战。2011年在土培条件下，以扬麦16号和扬辐麦2号两个当地高产品种为供试材料，于花后每隔1周喷施0.2%或0.4% ZnSO4 3次，以喷等量清水为对照，研究结实期叶面喷施锌肥对小麦籽粒不同部位锌含量的影响。结果表明，与对照相比，0.2%、0.4% ZnSO4处理使供试品种籽粒中的锌浓度平均分别增加58%和125%，达极显著水平。利用磨粉机Sedimat Laboratory Mill将小麦籽粒分为麸皮、次粉和面粉3个组分，测定数据表明，锌浓度为麸皮>次粉>面粉，最高和最低浓度相差约8倍。两品种平均，0.2% ZnSO4处理使小麦麸皮、次粉和面粉中锌浓度分别增加64%、54%和37%，0.4% ZnSO4处理使对应部位锌浓度分别增加117%、110%和92%，均达显著或极显著水平。结实期叶面施锌对籽粒各部位锌累积量的影响与锌浓度的响应趋势一致。与此不同，结实期叶面施锌对麸皮、次粉和面粉锌积累量占籽粒总锌积累量的比例没有影响。多数情况下，结实期锌处理对扬麦16号籽粒各部位锌浓度和锌累积量的影响大于扬辐麦2号。以上数据表明，通过选择适宜品种结合叶面施锌，可以经济有效地改善现代小麦品种面粉的锌营养水平。

英文摘要:

Zinc（Zn） deficiency is a widespread problem in the world, especially in the developing regions where staple foods derived from cereals are the main source of daily micronutrients intake. Therefore, the increase of Zn content in the endosperm, which is consumed as wheat flour by human being, is the main challenge in the research area of biofortification. Winter wheat cultivar Yangmai 16 and Yangfumai 2, grown in a cement tank filled with clay loam soil, were treated by foliar Zn application at 3 rates of 0（control）, 0.2% and 0.4% ZnSO4 at grain filling stage. The first Zn treatment was applied at 1 week after flowering（WAF）, the second and third application were at 2 WAF and 3 WAF, respectively. The plants in control plots received clean water. The results showed that foliar Zn application of 0.2% and 0.4% ZnSO4 increased grain Zn concentration by 58% and 125%, respectively. Wheat grains were further separated by Sedimat Laboratory Mill into bran, shorts and flour, and Zn concentration in each grain fraction were analyzed by ICP-AES. Zn concentration in different milling fractions followed the order of bran > shorts > flour, and Zn concentration in bran was 8 times higher than in flour. Compared with control, foliar 0.2% ZnSO4 application increased Zn concentration in bran, shorts and flour by 64%, 54% and 36%, respectively; and 0.4% ZnSO4 treatments increased Zn concentration in bran, shorts and flour by 117%, 110% and 92%, respectively; As the case of Zn concentration in grain fractions, Zn contents in bran, shorts and flour showed same trend in the response to foliar Zn application at grain filling stage. However, foliar Zn application at grain filling stage did not affect Zn distribution in different milling fractions of mature grains. Compared within cultivars, foliar Zn application had greater effect on Yangmai 16 than Yangfumai 2, as showed by most measured parameters. These results indicate that suitable cultivar selection accompanied with foliar Zn applications at grain filling stage improve Zn level of wheat flour, which will have beneficial effect on human health.

HTML 查看全文查看/发表评论下载PDF阅读器