施磷对蒙古莸(Caryopteris mongholica)形态和酸性磷酸酶活性的影响
收稿日期: 2014-04-09
修回日期: 2014-06-03
网络出版日期: 2015-07-20
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
Received date: 2014-04-09
Revised date: 2014-06-03
Online published: 2015-07-20
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
宋鑫 , 张东梅 , 张丽静 , 胡晓炜 , 陈晓龙 , 张燕慧 . 施磷对蒙古莸(Caryopteris mongholica)形态和酸性磷酸酶活性的影响[J]. 中国沙漠, 2015 , 35(4) : 917 -922 . DOI: 10.7522/j.issn.1000-694X.2014.00089
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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