苜蓿根系生长性状及其与产草量关系的研究  

Correlation of root system growth character to yield of alfalfa

作　　者：赵艳[1,2] 魏臻武[1] 吕林有[1,2] 满元荣[1] 武自念[1] 刘高军[1] 

机构地区：[1]甘肃农业大学草业学院,甘肃兰州730070 [2]辽宁省风沙地改良利用研究所,辽宁阜新123000

出　　处：《草原与草坪》2008年第6期1-4,共4页Grassland and Turf

基　　金：中澳苜蓿项目"中澳苜蓿逆境条件下适应性栽培"(ASI/1998/026);甘肃省教育厅科学技术研究项目和甘肃农业大学科技创新项目资助

摘　　要：对13个秋播苜蓿品种的根系生长性状进行调查研究,结合产草量分析表明:不同苜蓿品种间根系生长参数差异显著(P<0.05),其中Prime和WL323的根系植物量最高,大于32 g,WL323的侧根数最多,为17.8枝,综合评价以Prime、WL323、Super7和L90品种的根系生长性状最佳。在一年进行的3次刈割中,苜蓿自身根系的生长发育与第1次和第2次地上生长形成相互促进关系,而与第3次生长形成竞争关系,进入越冬时苜蓿根系的好坏制约着次年的产草量,特别是次年第3次的产草量。Growth character of root system of alfalfa cultivars which seeded in autumn was analyzed. The results indicated that there were significant difference in root system among alfalfa cultivars（P〈0.05）,the cultivars,Prime and WL323, showed highest root biomass （higher than 32g）, Meanwhile, cultivar WL323 had the most secondary root （17.8branch）. Cultivars Prime, WL323, Super7 and L90 were better than other cultivars based on comprehensive evaluation index of root system. In a year,the aboveground growth promoted root sys- tem growth in the lst-time and the 2nd-time produce while bated root system growth in the 3rd-time produce. Growth character of root system restricted the produce of next year before got into winter, especially the 3rd- time produce in next year.

关 键 词：紫花苜蓿 根系生长性状 产量 相关性 

分 类 号：S541.03[农业科学—作物学]