文献类型：期刊文献

中文题名：氮沉降模拟对不同种源木荷幼苗叶片生理及光合特性的影响

英文题名：The Effects of Nitrogen Deposition on Leaf Physiological and Photosynthetic Characters of Schima superba Seedlings from Three Provenances

作者：张蕊[1] 王艺[1] 金国庆[1] 周志春[1] 陈爱明[2] 储德裕[2]

第一作者：张蕊

机构：[1]中国林业科学研究院亚热带林业研究所;[2]浙江省淳安县姥山林场

年份：2013

卷号：26

期号：2

起止页码：207-213

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家林业公益性行业科研专项项目(201104001);浙江省科技厅农业新品种选育重大科技专项项目(2012C12908-6);"十二五"国家科技支撑计划课题(2012BAD01B04);浙江省重点科技创新团队项目(2009R50035)

语种：中文

中文关键词：木荷;种源;氮沉降;低磷;光响应曲线;光合色素;可溶性蛋白

外文关键词：Schima superba ; provenance ; nitrogen deposition ; phosphorus limitation ; photosynthetic-light responsecurve ; photosynthesis pigments ; soluble protein

分类号：S718.43

摘要：以浙北、闽北和赣南3个木荷代表性种源为试验材料,比较不同氮沉降水平下,木荷幼苗叶片的光合-光响应曲线、氮和磷含量、光合色素含量及可溶性蛋白含量之间的差异。结果表明:(1)中、低氮沉降水平促进了木荷幼苗叶片的光合能力,降低了呼吸消耗,叶片氮含量及叶绿素含量增高,叶片磷含量及可溶性蛋白含量降低,光合同化物易于积累;而高氮沉降水平时对光合能力的促进作用减小甚至产生危害。(2)木荷不同种源间叶片利用光能的程度差异较大,浙江杭州种源净光合速率较高,利用弱光的能力强,易发生光抑制现象,光合同化物不易积累;福建建瓯种源利用强光能力强,暗呼吸速率较低,同化物最容易积累;江西信丰种源光合能力和暗呼吸速率介于浙江杭州和福建建瓯种源之间。(3)低氮沉降水平对北部浙江杭州种源促进性强,叶片叶绿素和可溶性蛋白含量增加,光合能力增强,同时暗呼吸速率降低;中氮沉降水平对福建建瓯种源生产力促进最大,而叶绿素及可溶性蛋白含量在此水平下却较低;低氮沉降水平显著促进了南部江西信丰种源的净光合速率及利用弱光能力,呼吸消耗却并未显著增长,叶片可溶性蛋白增多。因此,在森林土壤磷含量较低的环境下,木荷育种不仅要考虑不同种源间的生长差异,同时也要充分考虑氮沉降的影响,才能达到最佳效果。
To evaluate the responses of physiological and photosynthetic character of Schima superba leaf to elevated nitrogen （N） deposition, dissolved NH4NO3 with different treatments （0, 50, 100 and 200 kg · hm^-2 · a^-1 N） was sprayed on one-year-old seedlings of three S. superba provenances. The photosynthetic light response curve, leaf N/ P/pigments and soluble protein contents were determined. The results indicated that the treatment of 100 kg · hm^-2 · a^-1 N deposition increased the apparent quantum efficiency （AQE）, light saturation point （LSP）, and maximum net photosynthetic rate （Pmax） , but reduced the dark respiration rate （Rd ）. Meanwhile, the leaf N and pigment content were higher, but leaf P and soluble protein content were lower than that of the control. However, the treat- ments of 200 kg · hm^-2 · a^-1 N deposition had a negative effect on the seedlings. There was large difference among the three provenances. The Hangzhou provenance from Zhejiang Province （HZ） had higher Pmax and could use low light easily. However, it was hard to accumulate the assimilation product. The Jian＇ ou provenance （JO） from Fu-jian Province showed stronger ability in using high light and the Rd was lower too, so this provenance was easier to accumulated assimilation product than other provenances. The leaf net photosynthetic rate, pigment and soluble pro- tein content of HZ increased under the treatment of 50 kg · hm^-2 · a^-1 Ndeposition, however, the Rd was reduced. The leaf pigment and soluble protein content of JO provenance was lower, but the production was largest under 100 kg · hm^-2 · a^-1 N. The N deposition of 50 kg · hm^-2 · a^-1 N promoted the photosynthetic rate of the Xinfeng prov-enance （XF） from Jiangxi Province increased the soluble protein content and improved the ability in using low light and the Ra was not increased either.