المؤلفون: Lan, Ting^{Aff1, Aff2, IDs1135602330638x_cor1}, Chen, Xiaofeng^{Aff1, Aff2}, Liu, Shuang^{Aff1, Aff2}, Zhou, Minghua, Gao, Xuesong^{Aff1, Aff2}

المصدر: Environmental Science and Pollution Research. 30(54):116162-116174

المؤلفون: Nusrat Jahan Mumu, Jannatul Ferdous, Christoph Müller, Weixin Ding, Mohammad Zaman, Mohammad Mofizur Rahman Jahangir

المصدر: Carbon Management, Vol 15, Iss 1 (2024)

مصطلحات موضوعية: Greenhouse gases, chamber method, micrometeorological method, isotopic method, gas chromatography, automatic method, Environmental sciences, GE1-350

وصف الملف: electronic resource

Relation: https://doaj.org/toc/1758-3004; https://doaj.org/toc/1758-3012

URL الوصول: https://doaj.org/article/08090034860341e1bf04dc869ed1d945

المؤلفون: XU Wen-qiang, LUO Ge-ping, CHEN Xi, FENG Yi-xing, LI Chao-fan

المصدر: Journal of Isotopes, Vol 29, Iss 3, Pp 140-145 (2016)

مصطلحات موضوعية: the Sangong river watershed was taken as a case. We had estimated the change of vegetation and soil organic along a vertical gradient using the carbon isotopic method, and analyzed the variations of mean SOC δ13C values with the annual precipitation, and researched the variations in SOC and δ13C values with profile depth in the study area. The results showed that the SOC δ13C decreased significantly with the increasing annual precipitation (R2=0.97) where the annual precipitation was less than 300 mm. When the annual precipitation was 300 mm~500 mm, the SOC δ13C was not significant changed with the increasing annual precipitation (R2=0.04). The enrichment effect of SOC δ13C with depth was significant in the sample site of pure C3 vegetation, that means lower layer SOC δ13C of profile was greater than the upper layer. The average difference of SOC δ13C between lower layer and upper layer was 1.01‰. The opposite trend of SOC δ13C was presented in the Desert and Shrubland sites. And that, the SOC δ13C value of upper layer closed to C4 vegetation source, and the lower layer closed to C3 vegetation source. Therefore, we can infer that the vegetation may have experienced from C3 to C4 in the sandy desert and terrene desert sites., carbon isotope, δ13C value, C3 and C4 vegetation, enrichment effect of δ13C, Sangong river, watershed, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798

وصف الملف: electronic resource

Relation: https://doaj.org/toc/1000-7512

URL الوصول: https://doaj.org/article/144fd864c2ad40b2aeb60ab5b4bf1b0e

المؤلفون: A. Rutkowska, D. Pikuła

المصدر: Plant, Soil and Environment, Vol 62, Iss 8, Pp 367-372 (2016)

مصطلحات موضوعية: cereal-pea mixtures, seeding rate, isotopic method, n distribution within plant, Plant culture, SB1-1110

وصف الملف: electronic resource

Relation: https://pse.agriculturejournals.cz/artkey/pse-201608-0005_efficacy-of-15n-nitrogen-in-fertilization-of-pea-mixtures-with-wheat-barley-and-oats.php; https://doaj.org/toc/1214-1178; https://doaj.org/toc/1805-9368

URL الوصول: https://doaj.org/article/f23f539ac60c49ba84528e93b33c3d7f

المؤلفون: Zhao, Na, Meng, Ping, Yu, Xinxiao

المصدر: Journal of Forestry Research. May 2017 28(3):529-537

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المؤلفون: Ivanov, A. F., Tikhonov, A. I., Mironova, N. E.

المصدر: Water Resources. November 2010 37(6):752-758

المؤلفون: Khokhlova, O. S., Kouznetsova, A.M., Khokhlov, A. A.

المصدر: Journal of Mountain Science. June 2009 6(2):139-146

المؤلفون: Anisichkin, V. F.

المصدر: Combustion, Explosion, and Shock Waves. September 2007 43(5):580-586

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