
植物营养与肥料学报2014,20(4):1038-1043 Journal of Plant Nutrition and Fertilizer
doi:10.11674/zwyf.2014.0428
不同形态氮对掌叶半夏生长及块茎
主要化学成分的影响
王乾,王康才*郑晨曦,朱碧春,王艺霖,杨嘉伟,王伟
(南京农业大学中药材研究所,江苏南京210095)
摘要:【目的】本文利用盆裁试验,探讨了不同铵态氮、硝态氮供应比例对掌叶半夏生长、相关生理指标及块茎中主要活性成分含量的影响,以期为掌叶半夏的合理施肥、科学种植提供技术依据。【方法】盆裁试验以蛭石为裁培基质,以掌叶半夏为试验材料,采用不同铵态氮、硝态氮比例处理,分析不同铵硝比例处理下掌叶半夏叶片中抗氧化保护酶(SOD、CAT),叶片、块茎中氮代谢关键酶(NR)的活性及块茎中次生代谢产物(MDA、硝酸盐及主要活性成分)的含量变化。【结果】1)叶片鲜重、块茎鲜重及总叶绿素含量总体均随铵态氮比例的升高而呈逐渐增加趋势,其中在全铵营养下,块茎鲜重和总叶绿素含量均达到最高值。2)随着铵态氮比例的升高,植株叶片中SOD、 CAT酶活性呈先升高后降低趋势;当铵硝比为50:50时,SOD、CAT酶活性最高,此时,叶片中NO,-N含量也达到 0 硝营养下,叶片、块茎中的NR活性均达到最高值,同处理水平下叶片中NR活性要高于块茎;并且随着铵态氮比例的增加叶片中NR活性呈逐渐降低的趋势,面块茎中的NR活性则呈逐渐增加的趋势。5)块茎中主要活性成分的累积更依赖于两种氮素的配施作用,在较高的铵态氮配施处理下(75:25时),总生物碱、总有机酸及腺苷的积累量均取得最高值。【结论适宜比例的铵硝配比可以促进掌叶半夏生长及产量的形成,其促进效果也显著高于全硝营养:当铵硝比为50:50时,其植物体内的相关酶活性也达到取高,说明适宜的铵硝配比能减轻膜质过氧化对植株细胞膜造成的损伤;同时,较高的NH,-N也有利于块茎中主要活性成分的积累,尤以铵硝比为75:25时,累积效果最显著。
关键调:氮素形态;掌叶半夏;抗氧化酶;活性成分
中图分类号:S567.23*9.062
文献标识码:A
文章编号:1008505X(2014)04103806
Effectofdifferentnitrogenousformsongrowthand
chemicalcomponentintuberofPinelliapedatisectaSchott.
WANG Qian, WANG Kang-cai*, ZHENG Chen-xi, ZHU Bi-chun, WANG Yi-lin, YANG Jia-wei, WANG Wei( Institute of Chinese Medicinal Materials, Nanjing Agricultural Unisersity, Nanjing, Jiangsu 210095, China)
Abstract :[ObjectivesJThe effect of different ratios of ammonium to nitrate supply on Pinellia pedatisecta Schott. growth related to physiological indicators and main active ingredient content in tubers were investigated in order to provide the technical basis for Pinellia pedatisecta Schott. rational fertilization. [ Methods]A pot experiment with vermiculite growing media to Pinellia pedatisecta Schott. as test material was conducted.Different ammonium to nitrate ratios in the growing media are designed, the antioxidant protective enzymes (SOD, CAT) activity of leaves, the nitrogen metabolism ( NR) activity in leaves and tubers and the content of secondary metabolites(MDA, nitrate, the main active ingredient) of tubers are measured. 【Results] 1) With the increasing of aseaoooeeaaareo gradually in the overall trend. Tuber fresh weight and total chlorophyll content in total ammonium nutrition reached the highest value. 2) With the increase of the proportion of ammonium nitrogen, the activity of SOD, CAT and NR
收稿日期:2013-06-24
接受日期:2014-03-25
作者简介:王乾(1987—),女,河北石家庄人,硕士研究生,主要从事药用植物裁培与生理研究。E-mail:2011104181@njau.edu.cn
*通信作者E-mail:wangkc@njau.edu.en