果实成熟期，甜瓜在有机生产体系中生物量较高，但两种体系的市场产量差异不显著。
In fruit mature period, muskmelon had higher biomass in organic production system, but there was no significant difference on market yield in both systems.
这一点很重要，因为理论表明，当目标鱼种的生物量为其原始水平的50%左右时，渔场才能达到可收获的最大可持续产量。
That matters because theory suggests that the maximum sustainable yield that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels.
对油杉种群的生物量进行了测定和研究。
The biomass of Keteleeria has been investigated and analyzed.
但也可以用生物量来制造生物燃料。
用生物量取代部分煤炭或许也不失为良策。
Substituting biomass for some of the coal burned can also help.
在土地被荒弃的几十年内，原始生物量恢复一半。
Within a few decades of land being abandoned, half of the original biomass has returned.
鉴于许多对浮游生物物种分类的估计是基于生物量。
Whereas many estimates about zooplankton had been based on biomass or functional groups, she has been trying "to put species back in the equation," she says.
研究了反冲洗对生物活性滤池生物量的影响。
Impact of backwashing on biomass growth in biological active filter was researched.
这里的生物量很丰富。
用生物量取代20%的燃料，发电站将进一步减排20%。
By replacing 20% of their fuel with biomass, power stations can reduce their emissions by a further 20%.
这个专题著作是煤和生物量气化技术的一本入门。
This monograph is a primer to coal and biomass gasification technologies.
低白色噪音水平下(1%到10%)生物量减少。
When the white noise levels Were low (1% to 10%), biomass was decreasing.
厌氧污泥及酵母菌在处理前后生物量几乎无变化。
But those of anaerobic sludge and yeasts almost keep unchanged before or after the treatment.
它们已经成了伊利诺斯河的主人，如今占那里90%的生物量。
They have takenover and now represent 90 percent of the biomass in the Illinois River.
许多研究者和公司正在试图研究出把生物量转化为乙醇的方法。
Researchers and several companies are developing methods for converting the plant biomass into ethanol.
地上生物量和生长高度的最高生长速率出现于同期。
The highest growth rate of biomass and growth high appear at same time.
与1993年资料相比，生物量及栖息密度显著降低。
Compared with the data of 1993, the biomass and inhabit density reduced obviously.
硅藻繁殖迅速，有些硅藻物类仅5个小时就能让其生物量翻一番。
They multiply rapidly—some species double their biomass in as little as five hours.
春秋季生物量及栖息密度等值线分布趋势无明显变化。
There were no clear differences in density or distribution of the macrobenthos between spring and fall.
不过，单从生物量碳积累来看，农林复合经营系统已经非常有效了。
However, even when just considering the accumulation of biomass carbon, an agroforestry system is very efficient.
科学家利用海洋颜色的变化来估计叶绿素含量以及海洋浮游植物的生物量。
Scientists use these changes in ocean color to estimate chlorophyll concentration and the biomass of phytoplankton in the ocean.
将叶绿素及其与悬浮质的比值的平均数作为对生物量的衡量指标。
The averages of chlorophyl and its ratio with ss were used as the measure indices of biomass.
污染、藻类大爆发，以及气温上升都是影响甲壳类生物量降低的因素。
Pollution, algae blooms, and rising temperatures all have roles to play in places where where shellfish stocks are declining.
因此，一种理想的生物能植物应能生产大量的地上部生物量燃料并有丰富的根系。
Therefore, an ideal bioenergy plant would produce lots of aboveground biomass for fuel as well as have an extensive root system.
储存在森林生物量、枯木、垃圾和土壤中的碳量共大约相当大气中碳量的50%。
Carbon stored in forest biomass, deadwood, litter and soil together is roughly 50 percent more than the amount of carbon in the atmosphere.
此外，种类组成、生物量和群落结构指数都随纬度和潮汛的不同而变化。
In addition, the composition of species, Numbers and the index of community structures were changed with latitude and spring tide.
杨树较快的树叶分解速度和生物量增长可大大提高曾经是不宜耕作的沙质土的土壤肥力。
Faster leaf decomposition and biomass growth have created a much more fertile soil on once sandy land, which was not always suitable for cultivation.
这种无脊椎动物以惊人的繁殖速度占领海洋，后分解为高浓度碳生物量，细菌难以有效吸收。
The invertebrates, populating the seas in ever-increasing numbers,break down into biomass with especially high levels of carbon, which thebacteria cannot absorb well.
云南松个体生物量、种群生物量、地上生物量和地下生物量均随林龄增加而增加。
It has been observed that individual, population, aboveground and underground biomass increase with increasing stand age.
他们的方法并不是要评估特定海域鱼种的实际生物量，而是评估在这一段时间内生物量的变化。
Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time.
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