【摘要】 通过对不同品种的紫花苜蓿初冬季节植物量(包括地上植物量和地下植物量及茎叶比值和茎叶含水量)的研究,结果表明,在不影响当年苜蓿的越冬和第2年返青及生长发育的条件下(地下植物量不再增加),在所试品种中部分品种茎叶含水量达萎蔫系数含水量以上时,地下植物量不再增加,而地上植物量在不断减少。由此可知,在供试品种中敖汉、苜蓿王、创新、皇后、劳博、WL-323、WL-424、WL-525HQ、WL-612在4℃之前可以对其地上植物量进行利用,对于WL-232HQ、WL-442、13R应该在0℃之前对其地上植物量进行利用,对于阿瑞博最早可以在-2℃时对其地上植物量开始利用。更多还原

【Abstract】 The biomass of alfalfa cultivars with different fall dormancy in early winter(including aboveground and underground biomass,ratio of stem to leaf and moisture contents of stem and leaf)was studied.The results showed that the underground biomass of some tested cultivars did not increase but the aboveground biomass decreased gradually while the water moisture of stem and leaf was close to the wilting coefficient under the condition of no affection on the over-winter and re-greening in second year.So,it could be concluded that the aboveground biomass of Aohan,Alfking,Innovator,Empress,Lobo,WL-323,WL-424,WL-525HQ and WL-612 could be utilized at 4°C,and WL-232HQ,WL-442 and 13R at 0°C,and Arriba at-2°C.更多还原