氮磷供给对长白落叶松苗木质量的影响  

EFFECTS OF SUPPLYING OF NITROGEN AND PHOSPHORUS TO Larix olgensis SEEDLING QUALITY

作　　者：孙慧彦[1] 刘勇[1] 马履一[1] 贾忠奎[1] 康瑶瑶[1] 金虎范[1] 姜辉 刘福森 李雪莲 

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 [2]吉林市龙潭区林业工作站,吉林132206 [3]吉林市龙潭区江密峰苗圃,吉林132206

出　　处：《内蒙古农业大学学报（自然科学版）》2011年第3期58-62,共5页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：国家"十一五"科技支撑计划(2006BAD24B01)

摘　　要：本文研究了暗棕壤条件下氮、磷施肥对长白落叶松播种苗质量的影响。结果表明:氮磷肥施用比例显著影响长白落叶松播种苗苗高、地径和主根生长;过量供氮并没有造成苗木徒长,而是通过加剧氮磷供应的不平衡来限制养分的均衡吸收,抑制苗木生长;在本试验地土壤有效氮富集而有效磷缺乏的条件下,长白落叶松播种苗适宜的施肥管理措施是控制肥料施入,通过苗木生长来消耗土壤中过饱和的氮素,以平衡土壤养分,既节约成本、休养土地,又使苗木质量得到整体提高。This experiment was conducted to assess the effects of nitrogen（N） and phosphorus（P） fertilizers on Larix olgensis seedling quality in dark brown soil and the results demonstrated that： applying proportion of N and P could significantly affect the height,diameter and length of taproot in treatments.Excessive supplying of N did not make the seedling excessively grow,but repressed seedling growth through exacerbating supplying balance of N and P and limiting balanced absorption of nutrients.In this site that effective N is abundant and effective P is lack,reasonable fertilization management of L.olgensis seedling is that apply no fertilizer and consume supersaturating N through seedling growth to balance nutrients in the soil,which could economize cost of cultural seedling,recuperate soil and improve seedling quality.

关 键 词：长白落叶松 氮磷比例 施肥 苗木质量 

分 类 号：S791.229.05[农业科学—林木遗传育种]