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| Soil stoichiometric ratio and its effect on carbon release potential of Jasminum sambac plantations in Fuzhou |
| Wang Xuming1, Zeng Dongping1, Min Qingwen2, Tong Chuan1, Wang Weiqi1, Zhang Yongxun2, Zheng Jiangmin3 |
| 1. College of Geographical Sciences,Fujian Normal University, 350007, Fuzhou, China; 2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 100101, Beijing, China; 3. Agricultural Bureau of Fuzhou City, 350005, Fuzhou, China |
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Abstract We selected organic Jasminum sambac plantation, common J. sambac plantation and J. sambac + Dimocarpus longan interplanting plantation as research objects in order to clarify the effect of different planting patterns on soil stoichiometric ratio and carbon release potential of J. sambac plantations. The soil total carbon (TC), total nitrogen (TN), total phosphorus (TP), total potassium (TK) mass fractions and carbon dioxide (CO2 ) release potential were measured. Results showed that: 1) mass ratios of soil carbon to nitrogen (C/ N) in the above-mentioned plantations were 11.33, 10.93, 9.48; carbon to phosphorus ratios (C/ P) were 23.23, 25.33, 10.91; carbon to potassium ratios (C/ K) were 1.02, 0.88, 1.66; nitrogen to phosphorus ratios (N/ P) were 2.05, 2.32, 1.14; nitrogen to potassium ratios (N/ K) were 0.09, 0.08, 0.17; phosphorus to potassium ratios (P/ K) were 0.04, 0.03, 0.15, respectively. 2) Soil C/ N ratio in the three J. sambac plantations followed the order of organic J. sambac plantation > common J. sambac plantation > J. sambac + D. longan interplanting plantation. Soil N/ P ratio was significantly lower in organic J. sambac plantation than in common J. sambac plantation, while soil P/ K ratio was the opposite. Soil C/ P and N/ P ratios were significantly lower in J. sambac + D. longan interplanting plantation than in common J. sambac plantation, while the opposite was true for soil C/ K, N/ K and P/ K ratios. 3) Soil CO2 release potentials were 5.80, 3.79 and 4.92 μg/ (g·d) in the three J. sambac plantations, respectively, but the difference was not significant. The soil C/ P, C/ K, N/ P and N/ K ratios of J. sambac + D. longan interplanting plantation were indicative to certain degree to the CO2 release potential in the profile. Interplanting-organic combination is a more reasonable planting pattern of J. sambac cropping systems in Fuzhou.
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Received: 15 April 2014
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ZHONG Yi-Jun, WU Lin, HUANG Qian-Ru, LIAO Mian-Qing, YE Chuan, CHENG Yan-Hong, SUN Yong-Ming, ZHANG Xin-Liang, XIONG Chun-Gui. Effects of planting pattern on soil moisture and drought resistance ability in red soil[J]. SSWCC, 2014, 12(2): 47-51. |
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