sample plot造句
例句與造句
- Within the stand one sample plot is laid down, often covering a large part of the stand .
在群落片段范圍內(nèi)設(shè)置一個(gè)樣地，通常應(yīng)占據(jù)群落片段的大部。 - Thus setting up a single sample plot in an area can produce some rather bewildering result .
因此，如果在某個(gè)地區(qū)內(nèi)只在某單塊抽樣小區(qū)內(nèi)采樣，那末就可能得到某種較為含糊的結(jié)果。 - The species diversity was richer , and diversity indexes varied with different sample plots
根據(jù)物種多樣性分析的結(jié)果，小隴山白皮松物種多樣性較豐富，不同樣地多樣性指數(shù)差異較大。 - 5 ) according to the results of investigating and analyzing plenty of sample plots and combing the conclusions of the succession process in the yellow river delta , the formation and succession of the wetland vegetation has two ways
5 )根據(jù)大量的樣方調(diào)查分析結(jié)果，結(jié)合黃河三角洲濕地植被演替過(guò)程的研究結(jié)論，得出了濕地植被形成和演替的規(guī)律。 - The training sample , valid sample and test sample were developed , taking data of 26 sample plots from may to october of 2001 as input indicators and phytoplankton biomass of each sample site as output factor
以2001年5 ~ 10月全太湖26個(gè)采樣點(diǎn)的實(shí)測(cè)水文、水質(zhì)、氣象等資料作為輸人因子，建立了訓(xùn)練樣本、檢驗(yàn)樣本和測(cè)試樣本，并以各采樣點(diǎn)的浮游植物量作為輸出因子。 - It's difficult to find sample plot in a sentence. 用sample plot造句挺難的
- Every soil fertility factor was recorded both in the early 1980s and 2000 at the same sample plot . all socio - economic data were derived from interviews with the production team leaders in charge of the sample plots , and were also gathered in both periods . after describing the trends in changes in soil nutrients from the early 1980s to 2000 , the dissertation sets up an econometric model to measure the possible impact of socio - economic factors on soil fertility
本研究樣本數(shù)據(jù)的特點(diǎn)之一是每個(gè)樣本地塊都有80年代初和2000年兩個(gè)時(shí)期的4個(gè)土壤肥力因子的觀測(cè)值，同時(shí)兩個(gè)時(shí)期的土壤采樣季節(jié)、技術(shù)以及實(shí)驗(yàn)分析方法等基本相似，這保證了土壤肥力數(shù)據(jù)具有完全的可比性。 - On the loess plateau , water is the main limiting factors for vegetation growth . root distribution characters have special ecological meaning as it reflected the utilizations of trees to the environments . even - aged stands of robinia pseudoacacia on slope lands facing south and north were selected as sampling plots for root distribution investigation . investigatiing results showed that indicated that on all sites , root biomass decreased with depth , and the distribution depth of fine root was deeper than that of coarser root . the results of variance analysis indicated that there were great differences in root biomass among different diameter classes , and coarser root was the main sources of variance , and the root biomass , especially fine root ( < 3mm ) biomass on northern exposition sites was bigger than that on southern exposition sites . analysis of the vertical root distribution parameters , root extinction coefficient , indicated that the value of on northern exposition was more than 0 . 982 , while the value of on southern exposition was less than 0 . 982 , which indicated that the vertical root distribution depth of robinia pseudoacacia on southern exposition was deeper than that on southern exposition . and the distribution depth of fine roots ( < 1mm ) was deeper than that of thicker roots ( < 3mm ) , which was in favor of the uptake of water and nutrients from deeper layers , helped the trees to adapt the arid environment , and promoted the growth of the upper parts of the tree
在中國(guó)西北黃土高原地區(qū),水分是樹木生長(zhǎng)發(fā)育的主要限制因子.根系分布特征由于反映了樹木對(duì)環(huán)境條件的利用程度而具有更加特殊的生態(tài)意義.本研究選擇陽(yáng)坡和陰坡不同立地上年齡一致的刺槐林調(diào)查了根系分布特征.根系垂直分布特征的調(diào)查結(jié)果表明,在所有立地上,根系生物量隨著深度的增加而降低,其中細(xì)根的分布深度大于粗根的分布深度.方差分析結(jié)果表明:不同立地上不同徑級(jí)根系的分布特征也有明顯的差別,粗根是差異存在的主要原因,陰坡立地上的根系生物量,特別是細(xì)根生物量大于陽(yáng)坡立地上的.對(duì)根系消弱系數(shù)的分析結(jié)果表明,陰坡立地上的根系消弱系數(shù)大于0 . 982 ,而陽(yáng)坡立地上的根系消弱系數(shù)小于0 . 982 ,說(shuō)明陰坡立地上刺槐根系的生物量在深層土壤中的分布相對(duì)量更大一些.其中細(xì)根的根系消弱系數(shù)大于粗根的,這種根系分布特征有利于根系對(duì)深層土壤水分養(yǎng)分的吸收利用,進(jìn)而促進(jìn)樹木地上部分的生長(zhǎng)發(fā)育.圖3表3參15 - The data used in this dissertation originate from 3 regions in china - the northeast , the north china plain and the mid - lower yangtze river - and cover 6 provinces , 15 counties , and 180 sample plots . the data include information on soil fertility , quality , and corresponding socio - economic data for the households farming the sample plots . the primary soil fertility indicators analyzed are soil organic matter , total nitrogen , effective phosphorus , and effective potassium
本文選擇有機(jī)質(zhì)、全氮、速效磷和速效鉀4個(gè)與農(nóng)作物生長(zhǎng)發(fā)育密切相關(guān)的土壤化學(xué)指標(biāo)作為土壤肥力的基本分析指標(biāo)；選取東北、華北和長(zhǎng)江中下游3個(gè)地區(qū)，包括黑龍江、吉林、北京、河北、江蘇和浙江6個(gè)省份15個(gè)縣市180個(gè)樣本地塊。 - By surveying the sample plot , the relations between the stabil ity of the mountai n slope of soil preparation for planting by using explosion and other factors s uch as precipitation , terrain ， were studied . by using the method of quantitative t heory i , the interrelation between the damaged degrees of soil preparation progra ms by using explosion in low mountain area with abundant precipitation and terrain factors was systematically analysed , and the mathematical models relate d were developed . the results show that the precipitation in early days and the m aximum precipitation per day are the primary factors causing the soil prepara tion program damaged . the main terrain factors of the mountain slope that affect the program stability are according to their importance , slope , position and dir ection . the suitable mountain slope for soil preparation by using explosion is th e slope of less than 25
通過(guò)典型標(biāo)準(zhǔn)樣地調(diào)查資料，探討了造林爆破整地工程的坡地穩(wěn)定性與降水、地形等因子的相互關(guān)系，應(yīng)用數(shù)量化理論，對(duì)在有充分降水條件下的低山丘陵區(qū)的爆破整地工程損失程度與地形因子之間的關(guān)系進(jìn)行了系統(tǒng)分析，并建立了相應(yīng)的數(shù)學(xué)模型，研究指出，充分的前期降水和日最大降雨量是引起爆破整地工程損失的激發(fā)因素；影響爆破整地工程穩(wěn)定性的主要地形因子是地面坡度，其次為坡位、坡向，實(shí)施爆破整地工程的地面坡度以不超過(guò)25為宜。 - Abstract : on the loess plateau , water is the main limiting factors for vegetation growth . root distribution characters have special ecological meaning as it reflected the utilizations of trees to the environments . even - aged stands of robinia pseudoacacia on slope lands facing south and north were selected as sampling plots for root distribution investigation . investigatiing results showed that indicated that on all sites , root biomass decreased with depth , and the distribution depth of fine root was deeper than that of coarser root . the results of variance analysis indicated that there were great differences in root biomass among different diameter classes , and coarser root was the main sources of variance , and the root biomass , especially fine root ( < 3mm ) biomass on northern exposition sites was bigger than that on southern exposition sites . analysis of the vertical root distribution parameters , root extinction coefficient , indicated that the value of on northern exposition was more than 0 . 982 , while the value of on southern exposition was less than 0 . 982 , which indicated that the vertical root distribution depth of robinia pseudoacacia on southern exposition was deeper than that on southern exposition . and the distribution depth of fine roots ( < 1mm ) was deeper than that of thicker roots ( < 3mm ) , which was in favor of the uptake of water and nutrients from deeper layers , helped the trees to adapt the arid environment , and promoted the growth of the upper parts of the tree
文摘:在中國(guó)西北黃土高原地區(qū),水分是樹木生長(zhǎng)發(fā)育的主要限制因子.根系分布特征由于反映了樹木對(duì)環(huán)境條件的利用程度而具有更加特殊的生態(tài)意義.本研究選擇陽(yáng)坡和陰坡不同立地上年齡一致的刺槐林調(diào)查了根系分布特征.根系垂直分布特征的調(diào)查結(jié)果表明,在所有立地上,根系生物量隨著深度的增加而降低,其中細(xì)根的分布深度大于粗根的分布深度.方差分析結(jié)果表明:不同立地上不同徑級(jí)根系的分布特征也有明顯的差別,粗根是差異存在的主要原因,陰坡立地上的根系生物量,特別是細(xì)根生物量大于陽(yáng)坡立地上的.對(duì)根系消弱系數(shù)的分析結(jié)果表明,陰坡立地上的根系消弱系數(shù)大于0 . 982 ,而陽(yáng)坡立地上的根系消弱系數(shù)小于0 . 982 ,說(shuō)明陰坡立地上刺槐根系的生物量在深層土壤中的分布相對(duì)量更大一些.其中細(xì)根的根系消弱系數(shù)大于粗根的,這種根系分布特征有利于根系對(duì)深層土壤水分養(yǎng)分的吸收利用,進(jìn)而促進(jìn)樹木地上部分的生長(zhǎng)發(fā)育.圖3表3參15 - Using the cluster analysis method and studying 16 sampling plots of shrub grassland where bothriochloa ischaemum is the dominant species , and the plots ' grass frequency , grass coverage , density , height , and biomass , we graded the plots into five grazing stages : light , proper , moderate , serious , and extreme
摘要在對(duì)放牧利用下的白羊草灌叢草地頻度、蓋度、密度、高度、生物量等數(shù)量特徵調(diào)查基礎(chǔ)上，運(yùn)用系統(tǒng)聚類分析方法，可戒分為輕放、適牧、中牧、重牧和極牧五個(gè)階段。 - Every sampling plot had sampled in random time and had not related to trigger time of random equivalent sampling . and it have function of trigger in advance and information of trigger and triggered . this project made use of random sampling . the random sampling theory possess of many advantages on technology
由于隨機(jī)等效采樣中,每一組采樣點(diǎn)是在隨機(jī)的時(shí)刻采集到的,而且與觸發(fā)無(wú)關(guān),而且他可以提供預(yù)觸發(fā)的功能以及觸發(fā)時(shí)刻?觸發(fā)后的信息,所以本設(shè)計(jì)采樣了隨機(jī)等效采樣