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| 1 | Microbial Biomass Carbon Trends in Black and Red Soils Under Single Straw Application: Effect of Straw Placement, Mineral N Addition and Tillage显示文摘Quantifying trends in soil microbial biomass carbon (SMBC) under contrasting management conditions is important in understanding the dynamics of soil organic matter (SOM) in soils and in ensuring their sustainable use. Against such a background, a 60-day greenhouse simulation experiment was carried out to study the effects of straw placement, mineral N source, and tillage on SMBC dynamics in two contrasting soils, red soil (Ferrasol) and black soil (Acrisol). The treatments included straw addition + buried (T1); straw addition + mineral N (T2); and straw addition + tillage (T3). Straw was either buried in the soil or placed on the surface. Sampling was done every 15 days. Straw placement, addition of external mineral N sources (Urea, 46 % N) and soil type affected SMBC. SMBC levels decreased with exposure durations (15 days, 30 days, 45 days, and 60 days). Rate of SMBC fixation was more in buried straw than in surface placed straw at all sampling dates in both soils. Addition of an external N source significantly increased SMBC level. Soil pH increased in both soil types, with a greater increase in black soil than in red soil. The study could not, however, statistically account for the effect of tillage on SMBC levels because of the limited effect of our tillage method due to the artificial barrier to mechanical interference supplied by the mesh bags, although differences in absolute values were quite evident between treatments Tl and T3. | J. CHILIMA, HUANG CHANGYONG and WU CIFANG College of Natural Resources and Environment, Zhejiang University, Hangzhou 310029 (China) | 2002 | Pedosphere2002，12，1： | 27 |
| 2 | Maternal HIV infection and infant mortality in Malawi: evidence for increased mortality due to placental malaria infection显示文摘 | Peter B. Bloland Jack J. Wirima Richard W. Steketee Ben Chilima Allen Hightower Joel G. Breman | 1995 | AIDS1995，，7： | 1 |
| 3 | Distribution of environmental mycobacteria in karonga district,northern malawi显示文摘 | Chilima BZ Clark IM Floyd S | | 0，，04： | 1 |
| 4 | Dietary mineral supplies in Africa显示文摘 | Edward J. M. Joy E. Louise Ander Scott D. Young Colin R. Black Michael J. Watts Allan D. C. Chilimba Benson Chilima Edwin W. P. Siyame Alexander A. Kalimbira Rachel Hurst Susan J. Fairweather‐Tait Alexander J. Stein Rosalind S. Gibson Philip J. White Mart | 2014 | Physiol Plantarum2014，，3： | 1 |
| 5 | Distribution of environmental mycobacteria in Karonga District,northern Malawi显示文摘 | Chilima BZ Clark IM Floyd S | 2006 | Appl Environ Microbiol2006，72，4： | 1 |
| 6 | Distribution of environmen- tal myeobacteria in Karonga District, northern Malawi显示文摘 | Chilima BZ Clark IM Floyd S | 2006 | Appl Environ Microbiol2006，72，： | 1 |
| 7 | Distribution of environmental mycobacteria in Karonga District, northern Malawi 显示文摘 | CHILIMA BZ CLARK IM FLOYD S ct al | 2006 | Appl Environ Mierobiol2006，72，4： | 1 |
| 8 | Quantification of the effects of management factors on maize (Zea mays L.) and cotton(Gossypium hirsutum L.) residues decomposition rate显示文摘Efforts to quantify management effects on decomposition rate of added substrates to the soil is important especially where such information is to be used for prediction in mathematical or simulation models. Using data from a short term (60 days) greenhouse simulation study, a procedure for quantifying effects of management on SOM and substrate decomposition is presented. Using microbial growth rate u (q), microbial efficiency in substrate utilization e (q), specific decomposition rates for added plant residues to two contrasting soils, red earth (Ferrasol) and black earth (Acrisol) were estimated. The treatments included straw addition + buried, (T1); straw addition + mineral N (T2); and straw addition + tillage, (T3). Sampling was done every 15 days. Straw decomposition rate was affected by external mineral N sources (Urea 46% N). Addition of an external N source significantly increased decomposition rates. The study could not, however, fully account for the effect of tillage on residues because of the limited effect of the tillage method due to the artificial barrier to mechanical interference supplied by the mesh bags. It is concluded that using few decomposer parameters, decomposition rates and consequently SOM trends in a soil system can be monitored and quantification of the influence of perturbations on decomposition rate of added substrates possible. | JONES Chilima, HUANG Chang yong, WU Ci fang (College of Natural Resources and Environment, Zhejiang University, Hangzhou 310029, China. | 2002 | Journal of Environmental Sciences2002，14，2： | 0 |
| 9 | 基于作物产量指标和聚类分析的立地分类比较研究(英文)显示文摘对棉地评价中基于作物产量指标和对土地属性作聚类分析的立地分类进行比较研究 .结果表明 ,从作物产量指标分析中可得出三个等级 :适宜级 (产量 >90 0 kg/ hm2 ) ,适宜级 (产量 50 0 - 90 0kg/ hm2 ) ,适宜级 (产量 <50 0 kg/ hm2 ) .而聚类分析中通过对 86个样本进行统计计算也得出三个等级 .两种分类方法的基本结论没有太大分歧 ,但通过聚类分析得出的立地分类与基于作物产量指标的立地分类并不完全一致 .研究结果也清楚地表明 ,经过适当的修正 。 | Jones Chilima 吴次芳 黄昌勇 | 2001 | 浙江大学学报(农业与生命科学版)2001，27，2： | 0 |
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