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您的检索式：作者名="Jones Chilima"
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| 1 | 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 |
| 2 | 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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