standing crops 中文意思是什麼
standing crops
解釋
現存量-
In this paper, two major types, the natural vegetation and crop vegetation in luota are studied. we can gain the different distributive area by remote sensing technology, in accordance with conifer forest, broadleaf forest, thick shrub forest, shrub forest, herbs shrub forest, herbs naked rock and crop vegetation. the valuation of the output of standing trees, water conserbancy, soil conserbation to control erosion and purify the air is the main basis which is used to value the functions of the forest ecosystem of the conifer forest and broadleaf forest of luotathe result reveal that the total ecological function value of the forest which area is 1388. 8 hm2 is estimated up to 18. 36 million yuan per annum. the synthetic valuation system of luota vegetation is put forward by the valuation of per hm2 in evergreen - deciduous forest, conifer forest, conifer and broadleaf forest, broadleaf forest, scatteredtree - shrub forest, coppice - shrub forest, herbs shrub forest, econamic crop and cereal crops. the plant resources is valued according to the ornamental and green plant. lumber trees and medical plant. ornamental plant includes hosta plantaginea. lilium brownii van viridulum, spiraea cantomiensis and so on. lumber tuees includes zzzelkova schneideriana, emmenopterys henryi, catalpa fargesii and so on
本文把洛塔現存植被分為自然植被與栽培植被兩大類進行研究，通過遙感技術對現存植被按針葉林、闊葉林、密灌、灌叢、草灌、荒草裸巖、農作物植被等類型進行分佈面積的統計，在此基礎上，以林產品價值、涵養水源價值、保護土壤價值和凈化空氣價值作為估算的主要參考依據，對已成林的針葉林與闊葉林進行森林生態系統的價值估算，得出面積為1388 . 8hm ~ 2的針葉闊葉林的森林生態價值為1836 . 37萬元，參照這一生態價值量，把洛塔植被按常綠落葉林、針葉林、針闊混交林、闊葉林、疏林?灌叢、矮灌叢、荒草灌叢、經濟作物和糧食作物，以每hm ~ 2的價值量提出了洛塔植被的綜合價值體系。 -
For the relationships between zoobenthos and environmental factors, results showed that zoobenthic standing crops were positively correlated with submersed aquatic macrophytes, total phosphorus and total nitrogen contents but were negatively correlated with depths and secchi disk transparencies
環境分析表明底棲動物總的現存量與水草生物量、總磷總氮含量均正相關，與水深、透明度均負相關。 -
To examine the effects of different lake uses on lacustrine zoobenthic community, zoobenthos were sampled in 1998 - 1999 from four shallow lakes of middle and lower basins of changjiang river, viz. fish stocking and touring lake, east tangsun lake ; fish - stocking - lake, niushan lake ; natural - fishing - lake, longgan lake and crab - overstocking - lake, huang lake. species composition, standing crops, functional feeding groups of benthic animals in every lake were studied
1998年4月1999年7月對長江中下游四個淺水湖泊即東湯孫湖、牛山湖、龍感湖和黃湖的底棲動物分別進行了四次採集，研究各個湖泊底棲動物在種類組成、現存量、功能攝食類群、生產顯和漁產潛力上的差異；結合各個湖泊理化生物因子綜合分析了湖泊不同利用方式對底棲動物群落的影響。 -
There were few reports about zoobenthic functional feeding groups in china so far, a detailed study of functional feeding groups species numbers, species percentages and standing crops in four lakes was done. results showed that functional feeding groups in the four lakes had their own characteristics. shredder percentage was highest in longgan lake than other three lakes
結果表明各個湖泊中功能攝食類群各有其特點，撕食者的比例以龍感湖最高，收集者的比例以黃湖最高，刮食者的比例以牛山湖最高，捕食者的比例以東湯孫湖最高。 -
4. the community structure and standing crops of periphyton in chinese reservoir were first reported. thirty - five genra of periphytic algae were collected using hanging plastic slices
8 .青梢帕culter由bryi鱗片的年輪從4月份開始形成，大部分年輪形成時間在7月。
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