摘要
为了分析不同砧木苹果树细根的发生和周转动态,连续4年通过微根管技术研究不同砧木的5年生‘富士’苹果砧穗组合细根中的活根根长密度与死根根长密度的动态变化,以及细根年周转率和季节周转率。结果表明,乔砧树富士/八棱海棠的活根根长密度最大,矮化中间砧富士/M9/八棱海棠和富士/SH40/八棱海棠次之,矮化自根砧富士/M9、富士/SH40和富士/小金海棠最小,所有砧穗组合的活根根长密度随着树龄的增加而逐年减小。所有砧穗组合在夏秋季出现细根发生和死亡高峰期,乔砧树富士/八棱海棠的细根发生高峰期的活根根长密度和死根根长密度均最大。细根年周转率和季节周转率年度间差异大,矮化自根砧树细根的年周转率高于乔砧树。矮化自根砧和矮化中间砧树体ARLD低于乔砧树体可能与其致矮性相关。
The dynamics of alive root length density,dead root length density,annual fine root turnover and seasonal fine root turnover in five-year old apple cultivar Fuji grafted on rootstocks or interstems were investigated through four consecutive years observation by using minirhizotrons to analyze the production and turnover of fine root from different apple scion-stock combinations. Results showed that alive root length density,from vigorous scion-stock combinations Fuji/Baleng Crab were the largest,less for dwarfing inter-stem combinations Fuji/M9/Baleng Crab and Fuji/SH40/Baleng Crab,the least for trees on dwarfing rootstocks like Fuji/M9,Fuji/SH40 and Fuji/Malus xiaojinensis. Alive root length density,decreased with tree age increased. The peak of fine root production and death occurred in summer and autumn for all scion-stock combinations. The largest average alive root length density,and dead root length density took place in vigorous scion-rootstock combinations Fuji/Baleng Crab. The annual difference of annual fine root turnover and seasonal fine root turnover was huge,and annual fine root turnover in trees grafted on dwarfing rootstock was higher than that in ones on vigorous rootstock. Alive root length density,from trees on dwarfing rootstock and interstems were lower than those from ones on vigorous rootstock,which were possibly related to dwarfing effect.
出处
《园艺学报》
CAS
CSCD
北大核心
2014年第8期1525-1534,共10页
Acta Horticulturae Sinica
基金
公益性行业科研专项(201203075)
现代苹果产业技术体系项目(CARS-28)
农业部园艺作物营养与生理重点实验室项目
农业科研杰出人才及其创新团队资助项目
关键词
苹果
砧木
细根
周转率
矮化
apple
rootstock
fine root
turnover
dwarfing
