饲用黑麦、小黑麦品种的抗旱性评价

摘要

Using field simulating dry method, the drought resistance of nine forage rye and triticale varieties was studied based on the characteristics of growth and development, yield and quality characters, photosynthetic and physiological indexes. The drought resistance of tested varieties were assessed by drought index (DI). The results showed that these index values, such as the grass yield, plant height, stem number, ratio of stem/leaf and crude protein content, had a significant decreased trend, but spike number and ratio of fresh/dry increased a little, and photosynthetic indexes decreased. According to drought index (DI), the drought resistance of different varieties was as follows:Dongmu 70>Jisi 2>Jisi 1 >Zhongsi 828>Zhongxin 830>Zhongsi 237>NTH 1888>NTH 1048>Jinsong 49.%用干旱棚田间全生育期模拟干旱法,对9个饲用黑麦、小黑麦品种的生长发育特性、产量、品质性状、光合及生理指标进行了抗旱性分析,并用抗旱指数进行抗旱性评价,结果表明:干旱胁迫显著降低了各品种的产草量、株高、茎数、茎叶比和粗蛋白质含量,成穗率和鲜干比略自增加,光合指标降低,抗旱指数顺序为冬牧70＞冀饲2号＞冀饲1号＞中饲828＞中新830＞中饲237＞NTH1888＞NTH1048＞劲松49.