不同氮素用量对文冠果生长、养分积累及转运的影响  

Effects of N application rates on growth,nutrient accumulation and translocation of Xanthoceras sorbifolia

作　　者：杨腾[1] 段劼[2] 马履一[1,2] 贾黎明[1,2] 彭祚登[1] 陈闯[1] 陈婧[1] 

机构地区：[1]北京林业大学林学院 [2]北京林业大学国家能源非粮生物质原料研发中心

出　　处：《北京林业大学学报》2014年第3期57-62,共6页Journal of Beijing Forestry University

基　　金：科技部国际科技合作专项(2014DFA31140);教育部博士点基金优先发展领域项目(20120014130001);北京林业大学"985"创新平台项目(1108000--06)

摘　　要：通过小区盆栽试验,研究不同氮素用量对文冠果生长、养分积累及转运的影响,以确定文冠果育苗最佳氮肥用量。试验设5个处理,总氮素用量分别为0、130、180、230、280 mg株,以N0、N1、N2、N3、N4表示,5次重复,各处理氮素分12周平均施入。结果表明:不同氮素用量显著影响文冠果生长季生物量和养分积累量,整个生长季内文冠果氮、磷、钾积累量为氮>钾>磷;不同氮素用量影响根、茎、叶中氮、磷、钾的转运效率和在不同器官中的分配比率,转运效率以N3处理最高;在氮、磷、钾3种元素中,积累效率为氮>磷>钾;生长季末氮、磷、钾养分主要集中在根和叶中。在本试验条件下,文冠果育苗的推荐施氮量为230 mg株。In an effort to determine the optimal nitrogen application rate for Xanthoceras sorbifolia, a series of field trials were conducted to investigate the effects of different nitrogen application rates on the growth, nutrient accumulation and translocation in this species. Five nitrogen application levels of 0 （N0） , 130 （ N1） , 180 （ N2） , 230 （ N3） and 280 （N4） mg/seedling were set up with five replications. Fertilizer in the form of urea was applied once a week and 12 times throughout a single growing season; the amount of fertilizer was the same in each nitrogen application. The results indicated that different nitrogen application rates significantly affected biomass and nutrition accumulation rates at different stages of growth in this species. The order of accumulation of nitrogen, phosphorus and potassium throughout the entire growing season was N 〉 K 〉 P. Nitrogen application rates affected the translocation efficiency and distribution ratio of nitrogen, phosphorus and potassium in different organs. The highest translocation efficiency was found in N3. The order of accumulation efficiency of nitrogen, phosphorus and potassium was N 〉 P 〉 K. Nitrogen, phosphorus and potassium nutrients mainly concentrated in the roots and leaves during the later stages of growth. Under the experimental conditions used here, the recommended nitrogen application rate for X. sorbifolia is 230 mg/seedling.

关 键 词：文冠果 氮 磷 钾 养分积累 转运 

分 类 号：S685.23[农业科学—观赏园艺]