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中国沙漠 ›› 2015, Vol. 35 ›› Issue (4): 917-922.DOI: 10.7522/j.issn.1000-694X.2014.00089

• 生物与土壤 • 上一篇    下一篇

施磷对蒙古莸(Caryopteris mongholica)形态和酸性磷酸酶活性的影响

宋鑫, 张东梅, 张丽静, 胡晓炜, 陈晓龙, 张燕慧   

  1. 兰州大学 草地农业科技学院/草地农业系统国家重点实验室, 甘肃 兰州 730020
  • 收稿日期:2014-04-09 修回日期:2014-06-03 出版日期:2015-07-20 发布日期:2015-07-20
  • 通讯作者: 张丽静(Email:lijingzhang@lzu.edu.cn)
  • 作者简介:宋鑫(1989-),男,甘肃兰州人,硕士研究生,主要从事草地营养生物学研究。Email: songx12@lzu.edu.cn
  • 基金资助:

    国家重点基础研究发展计划项目(2014CB138703);国家自然科学基金项目(30800801)

Effects of Phosphorus Application on Morphology and Acid Phosphatase Activity of Caryopteris mongholica

Song Xin, Zhang Dongmei, Zhang Lijing, Hu Xiaowei, Chen Xiaolong, Zhang Yanhui   

  1. State Key Laboratory of Grassland Agro-ecosystems/College of Pastoral Agriculture Science and Technology, Lanzhou Univerisity, Lanzhou 730020, China
  • Received:2014-04-09 Revised:2014-06-03 Online:2015-07-20 Published:2015-07-20

摘要:

采用土培法,设置不同的供磷水平(P0,0 mg·kg-1;P1,17.5 mg·kg-1;P2,35 mg·kg-1;P3,52.5 mg·kg-1;P4,70 mg·kg-1),对蒙古莸(Caryopteris mongholica)地上部形态、根系形态、生物量、叶片和根系酸性磷酸酶活性的变化进行研究。结果表明:(1)株高、基径、茎粗、地径随供磷水平增加均呈现出先增大后减小的趋势,在P1水平下最大。(2)总根长、根体积、根表面积、根平均直径随供磷水平增加呈现出先增加后减小的趋势,其中在P1水平下总根长和根平均直径达到最大。(3)P0水平下根冠比最大,地上部干重和根系干重在P1水平下最大。(4)根系酸性磷酸酶活性随供磷水平增加呈现出逐渐下降的趋势,并且与根体积、总根长、根平均直径、根表面积均呈负相关;叶片酸性磷酸酶活性随供磷水平增加呈现出先降低后上升的趋势,并且与株高、地径、基径、茎粗、地上生物量均呈负相关。

关键词: 磷, 蒙古莸(Caryopteris mongholica), 生长, 根系, 酸性磷酸酶

Abstract:

The experiment used soil to cultivate the plant materials, and then set up 5 different phosphorus levels(P0,0 mg·kg-1;P1,17.5 mg·kg-1;P2,35 mg·kg-1;P3,52.5 mg·kg-1;P4,70 mg·kg-1). Under the different phosphorus levels, we measured Caryopteris mongholica growth morphological parameters, root morphological parameters, biomass and the APase activity. The results indicated that: the plant height, basal diameter, stem width, ground diameter, root length, root volume and root diameter increased at first and then decreased with the P level grown. And all the morphological parameters were biggest under the P1 level. The root shoot ratio, shoot and root dry weight under the P0 level were the biggest in all P levels. The APase activity decreased with the P level grown. There was a negative correlation between the root APase activity and root volume, total average root length, root diameter, root surface area. There was also a negative correlation between the leaf APase activity and plant height, basal diameter, stem width, ground diameter, shoot biomass.

Key words: phosphorus, Caryopteris mongholica, growth, root, acid phosphatase

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