11个紫花苜蓿品种在西藏河谷区的引种试验研究

Study on 11 Alfalfa Varieties Introduction in Tibet Valley Area

为了缓解西藏河谷区蛋白饲草不足的问题,筛选适宜河谷区种植的优质紫花苜蓿品种,本研究对国内外引进的11种紫花苜蓿(Medicago sativa)品种(美国WL系列苜蓿、先行者、苜丰、惊喜和中牧1号苜蓿)的生育期、越冬率、株高、茎叶比以及根系表型性状进行品种比较分析。结果表明,引进的紫花苜蓿均能在该区正常生长且越冬,WL343HQ、WL366HQ、WL298HQ、WL168HQ、WL168HQ、WL319WL、先行者和苜丰的越冬率均超过90%,且先行者最高,达到94.5%;先行者和WL168HQ株高相对较高;参试苜蓿的叶量均在60%~66%,其中以中苜1号的叶量最高,茎叶比为0.66,其分枝数显著高于其他苜蓿(P<0.05);参试苜蓿主根长为20.09~34.66 cm,其中WL168HQ的最长,苜丰的根颈直径最大,为8.32 mm,WL354HQ的根颈入土最深;综合分析可知,中苜1号的主根发达且分枝数较多。先行者、WL168HQ和苜丰在越冬率、株高方面的田间表现较好。

The objectives of this research was to solve the problem of insufficient protein-forage in Tibet Plateau,high-quality alfalfa varieties suitable for planting in the valley area were screened.Compared the growth period,wintering rate,height,stem-leaf ratio and root traits of11 different varieties("WL"alfalfa varieties,xianxingzhe,mufeng,jingxi and zhongmu No.1)introduced from home and abroad.The results showed that the alfalfa grow well and overwinter,overwintering rates of L343 HQ,WL366 HQ,WL298 HQ,WL168 HQ,WL168 HQ,WL319 WL,xianxingzhe andmufeng were all over 90%,and xianxingzhe was reaching 94.5%.The height of xianxingzhe and WL168 HQ was relatively high;the leaf volume of all tested materials were 60%-66%,and zhongmu No.1 was the highest,the stem-leaf ratio reached 0.66,and the branch was significantly higher than the other varieties;the root length of alfalfa were 20.09-34.66 cm,of which WL168 HQ was the longest;the root collar diameter of mufeng was the largest,which was 8.32 cm;the crown depth in soil of WL354 HQ was the deepest.The comprehensive analysis showed that the main root of zhongmu No.1 developed well and with the more branched.The xianxingzhe,WL168 HQ and mufeng performed better in the field of wintering rate and plant height.