From population level to functional group level, and then to community level, the yearly-variation of aboveground biomass minimizes gradually and stability increases.
从植物种群水平、植物功能群水平到群落水平，地上生物量的年度间变异性逐渐降低，稳定性逐渐增加。
Water culture experiment was carried out with winter wheat at the tillering stage to study the influence of nitrogen level on some nitrogenous substances and biomass of wheat.
利用水培研究了氮素水平对冬小麦分蘖期某些含氮化合物及生物量的影响。
The main results were as follows: 1. Plant height, culm thickness and biomass per plant were correlated to the lodging index at the 1% level of significance.
倒伏指数与株高、地上部生物量、茎粗的相关系数均达1%显著水平，表明水稻倒伏指数受株高、地上部生物量和茎粗等性状的显著影响。
The relationship between soil temperature and underground biomass with soil respiration rate reached significant level.
土壤温度和地下生物量与土壤呼吸的关系均在显著水平。
Through observation of leaf and branch growth in pot experiment, biomass increase during growth period was tested to study the growth situation of Atriplex canescenes in various salt level soils.
采用盆栽试验，通过观察叶片和枝条的生长状况，测定生长期内生物量的增加情况，研究四翅滨藜在不同含盐土壤中的生长状况。
The results were as follows:(1) The ramets density and population biomass at high level of soil moisture supply were higher than that of the population at low level of soil moisture supply.
结果表明：①土壤水分有效性高的种群，其子株密度和生物量大于土壤水分有效性低的种群。
The microbial biomass C and N in rice-fish paddy fields is remarkably higher than those in control paddy fields, both at significance level P <0.01;
养鱼水田的土壤微生物生物量C和N明显高于对照水田，均达到极显著差异水平（P〈0.01）；
The single factor analysis showed that smoking, use of biomass fuels and lower level of living condition might be risk factors for COPD.
单因素分析显示：吸烟、使用生物燃料和生活水平差也可能是罹患COPD的危险因素。
Combustion dynamics analysis indicates that the combustion of biomass, coal and their mixtures can be treated as a level 1 response processing.
燃烧动力学分析表明，生物质、煤及其混合物的燃烧可以作为一级反应处理。
Combustion dynamics analysis indicates that the combustion of biomass, coal and their mixtures can be treated as a level 1 response processing.
燃烧动力学分析表明，生物质、煤及其混合物的燃烧可以作为一级反应处理。
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