追施氮肥对长白落叶松移植苗生长的影响  

Effect of top dressing nitrogen fertilizer on the Larix olgensis transplantation seedlings

作　　者：马跃[1] 马履一[1] 刘勇[1] 李国雷[1] 康瑶瑶[1] 祝燕[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《林业科技开发》2010年第3期60-63,共4页China Forestry Science and Technology

基　　金：国家"十一五"科技支撑计划项目(2006BAD24B01)

摘　　要：对长白落叶松移植苗进行了追肥试验,研究了追施氮肥量和追肥时间对苗木生长量和各器官养分分配规律的影响。结果表明:不同施肥处理对长白落叶松移植苗的苗高、地径和生物量均有显著的影响。追施氮肥量为120 kg/hm2,追肥时间为7月初是最佳的施肥处理,其苗高、地径、叶生物量、茎生物量、根生物量及总生物量分别比对照增加26%、24%、69.3%、119%、70.3%和88.2%;追肥时间对苗木生长量及体内N、P浓度影响相对较小;长白落叶松体内全N和全P在各器官的分配状况为叶>根>茎,全N在苗木内浓度随着尿素施用量的增加而增加,而全P在苗木体内的浓度则随着氮肥使用量的增加而下降。The effects of amount and time of top dressing nitrogen on the growth and nutrient distributions of one year old Larix olgensis transplantation seedlings were studied in this paper. The results showed that the top dressed nitrogen fertilizer amount and time hand significant influences on the seedling height, ground diameter and total biomass and the optimum fertilization treatment was that the nitrogen was top dressing at level of 120 kg N/hm2 in July early. The seedling height, ground diameter, biomass of leaf, stem and root in this treatment was increased by 26%, 24%, 69.3%, 119%, 70.3% and 88.2% respectively, compared with the control. The effects of top dressing nitrogen amount on the growth, N and P concentration of L. olgensis transplantation seedlings were greater than that of top dressing time. The distribution of N and P content was in the order of leaf 〉 root 〉 stem. The N concentration in the seedlings was increased with the increase of top dressed N level, while the P concentration was decreased.

关 键 词：长白落叶松 追氮肥量 追肥时间 

分 类 号：S791.229[农业科学—林木遗传育种]