旱胁迫对啤酒大麦产量及酿造品质的影响

在武威黄羊镇啤酒大麦试验基地进行了干旱胁迫对甘啤6号生育期、农艺性状、籽粒产量、原麦品质、酿造品质的影响试验研究。结果表明:干旱胁迫下甘啤6号各生育期均提前,成活率降低,分蘖减少,株高、穗长、单株穗数、单株粒数、单株粒重、单穗粒重、穗粒数均降低;干旱胁迫使甘啤6号成穗数、穗粒数、千粒重均降低,导致产量降低,其中对成穗数影响最大,其次为穗粒数,对千粒重影响最小;干旱胁迫使大麦蛋白质含量升高,千粒重、淀粉含量和筛选率均降低,千粒重降幅尤其明显;干旱胁迫使麦芽糖化时间、糖化力、粘度、β-葡聚糖、微粉浸出率、粗细粉差降低,粗粉浸出率、a-氨基氮、可溶性氮、蛋白质、库值升高。

Effects of drought stress on the yield and quality of malting barley

Influences of drought stress on growth period ,agronomic characteristics ,grain yield ,quality and malt quality of barley variety Ganpi 6 were systematically investigated in this research .The results showed that under drought stress ,all growth periods of Ganpi 6 were advanced ,survival rate was reduced ,tiller number was decreased ,and plant height ,ear length ,panicle number per plant ,grains per plant ,seed weight per plant ,grain weight per panicle ,and seeds per ear were decreased .The yield of Ganpi 6 was decreased due to the drought stress that caused reduction of ear number ,grains per spike and 1000-grain weight .In addition ,ear number was affected the most ,followed by k grains per spike ,and the 1000-grain weight was least impacted .Drought stress increased the protein content ,and decreased 1000 grain weight ,starch content and the screening rate .However ,the decreasing level of 1000 grain weight was higher than that of screening rate and starch content ,and the decreasing level of starch content was the minimal .Also ,drought stress decreased malt saccharifying time ,diastatic power ,viscosities ,β - glucanase ,fine powder extract and the thick-ness difference of powder ,whereas increased coarse powder extract ,α - amino nitrogen soluble nitrogen ,protein ,and kolbach index .