title: [Absorption and utilization of different applied nitrogen forms by winter jujube].
abstract: With pot experiment, this paper studied the absorption and utilization of applied urea N, Gly N and Glu N by two years old winter jujube. The results showed that all of the three N forms could be absorbed by the winter jujube, but the absorption rate of Gly N and Glu N was less than that of urea N. Taking the absorption rate of urea N as 100%, the relative absorption rate of Gly N and Glu N by jujube leaves was 28.88% and 11.73%, respectively, and the absorbed N was mainly allocated to the leaves and neonatal branches. Jujube roots could absorb 50.48% of Gly N and 42.72% of Glu N. The transaminase activity and soluble protein content in jujube leaves were increased after the application of these three N forms, but the leaf nitrate reductase activity was enhanced significantly by urea N, decreased by Gly N, and less affected by Glu N. Compared with urea N, amino acid N could significantly increase the number of colored fruits and their colored area, as well as the content of fruit soluble solid matter.
authors.affiliation: State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai' an 271018, Shandong, China. qianke_py@163.com
authors.forename: Yong
authors.initials: Y
authors.lastname: Peng
authors.forename: Fu-tian
authors.initials: FT
authors.lastname: Peng
authors.forename: Peng
authors.initials: P
authors.lastname: Zhou
authors.forename: Xiao-yan
authors.initials: XY
authors.lastname: Zhang
mesh_terms: D000042:Absorption; D000596:Amino Acids / Q000378:metabolism; D005308:Fertilizers; D009584:Nitrogen / Q000737:chemistry / Q000378:metabolism*; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism*; D010940:Plant Proteins / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D012987:Soil / Q000032:analysis; D014508:Urea / Q000378:metabolism; D031957:Ziziphus / Q000254:growth & development / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D005308:Fertilizers; D010940:Plant Proteins; D012987:Soil; D014508:Urea; D009584:Nitrogen