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Effects of Long-term Located Fertilization on the Physico-chemical Property of soil humus

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Agricultural Sciences in China 2002年第4期1卷 424-431页

作者： SHI Ji-ping, ZHANG Fu-dao and LIN Bao(School of Agriculture, Shanghai Jiao Tong University, Shanghai 201101 , P.R. China soil and Fertilizer Inst. CAAS , Beijing 100081 , P.R. China ) School of Agriculture Shanghai Jiao Tong University Shanghai 201101 P.R. China soil and Fertilizer Inst. CAAS Beijing 100081 P.R. China

A systematic study concerning the effects of a long-term stationary fertilization on content and property of soil humus in fluvo-aquic soil sampled from Malan Farm, Xinji City, Hebei, and arid red soil and paddy red soil sampled from the Institute of Red soil, Jinxian County, Jiangxi was conducted. The results showed that long-term fertilization had effects not only on the content and composition of soil humus, but also on the physico-chemical property of humus. With applying organic manure or combined application of organic manure and chemical fertilizer, E4 and E6 values of humic acid decreased in fluvo-aquic soil and arid red soil, but increased in paddy red soil. In paddy red soil, E4 and E6 values of humic acid increased also with a single application of chemical fertilizer, but E4 and E6 values had less change of humic acid in fluvo-aquic soil and arid red soil. The effects on the visible spectroscopic property of f ulvic acid were different from that of humic acid. Long-term application of organic manure or combined application of organic manure and chemical fertilizer could increase E4 and E6 values of f ulvic acid in three types of soil. Single application of chemical fertilizer had less effect on the E4 and E6. Long-term fertilization could also influence the ultraviolet spectroscopic property of humus. With a single application of organic manure or combined application of organic manure and chemical fertilizer, the ultraviolet absorbance of humic acid and f ulvic acid increased in the three types of soil. But this effect was obvious only in short wave length, and the effect could decrease if the wave length increased. With a single application of chemical fertilizer the ultraviolet absorbance of fulvic acid could increase, but it of humic acid increased only in fluvo-aquic soil. Long-term application of organic manure or combined application of organic manure and chemical fertilizer could increase the content of total acidic groups, carboxy groups and phe

关键词： Long-term located fertilization soil humus Fluvo-aquic soil Arid red soil Paddy red soil

soil Fertility in Agroforestry System of Chinese Fir and Villous Amomum in Subtropical China

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Pedosphere 2001年第4期11卷 341-348页

作者： YANG YUSHENG, CHEN GUANGSHUI and YU XINTUO Fujian Agriculture and Forestry University, Nanping 353001 (China) 福建农林大学福建南平 353001

A trial of interplanting and non-interplanting villous amomum (Amomum villosum Lour.) under the canopy of Chinese fir (Cunninghamia lanceolata Hook.) at age 22 was established in Sanming, Fujian of China, and a survey on soil fertility was carried out 10 years after its establishment. Compared with the control (non-interplanting), the properties of soil humus in agroforestry system were ameliorated, with a higher level of humification and resynthesis of organic detritus. The soil microbial population and enzymatic activities were both higher under the influence of villous amomum. Both the nutrient supplying and nutrient conserving capacities of the soil were improved. This agroforestry system exhibited an advantage of improved soil fertility as well as an accelerated growth of Chinese fir, it was, therefore, a sustainable management system suited for Chinese fir in South China.

关键词： agroforestry Chinese fir soil biological activity soil humus soil structure

Growth characteristics of multipurpose tree species, crop productivity and soil properties in agroforestry systems under subtropical humid climate in India

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Journal of Forestry Research 2007年第4期18卷 261-270页

作者： M. Datta N. P. Singh ICAR Research Complex for NEH Region Lembucherra Tripura 799 210 India

Multipurpose tree species （MPTs） were studied in an agroforestry arboretum under subtropical humid climate in Northeast India. Out of 12 MPTs planted under agroforestry systems, Acacia auriculiformis in spacing of 2 m × 2 m （2500 stems·hm^-2） could have the potentiality to meet the timber/fuelwood requirement due to its high wood production of 635 m^3·hm^-2 with mean annual increment （MAI） of 2.54×10^-2 m^***.a^-1 in a short rotation period of 10 years. Thus, A. auriculiformis is a short rotation forest tree species suitable to grow in subtropical humid climate. On the other hand, at 16 years of age, Eucalyptus hybrid and Michelia champaca in spacing of 3 m × 3 m （1111 ***^2） produced appreciably high timber volume of 315 m^***^-2 and 165 m^***^-2 with MAI of 1.77×10^-2 m^***^-1·a^-1 and 0.92×10.2 m^***^-1.a^-1, respectively. At 16 years of age, Gmelina arborea produced a timber volume of 147 m^***^-2 with MAI of 1.47×10^-2 m^***^-1.a^-1 followed by Samania saman （140 m^***^-2）, Albizziaprocera （113 m^3·hm^-2） and Tectona grandis （79 ***^-2） with MAI of 1.40, 1.13 and 0.78 × 10^-2 m^3 .tree^-1a^-1, respectively in 4 m × 4 m spacing （625 ***^-2）. Gliricidia maculata and Leucaena leucocephala could be used as live fences around the farm boundary to supply their N-rich leaves for mulch as well as manure to crops. In agroforestry arboretum, direct seeded upland rice （Oryza sativa - variety, AR-11）, groundnut （Arachis hypogaea - variety, JL-24） and sesamum （Sesamum indicum - variety, B-67） were grown during the initial period upto 8 years of tree establishment. Under other MPTs, there was a reduction in crop productivity as compared to open space. After 8 years of tree establishment, horti-silvi and silvi-pastoral systems were developed and pineapple （Ananas comosus - variety Queen）, turmeric （Curcuma longa -variety RCT -1） and cowpea （Vigna sinensis - variety Pusa Barsati） as forage crop were raised. The productivity of pineapple, turmeric a

关键词： Multipurpose trees Subtropical humid climate Growth characteristics Timber volume Crop productivity soil organic car-bon soil humus Nutrient availability soil erodibility indices soil moisture.