Through research, give the following conclusion: there is no competition, lotus leaf fern and wire fern Adiantum as drought intensifies, the total biomass of a decreasing trend when the water content at the same time, with the intensity of Increase in total biomass showed an increasing trend, LAR general with the increase in soil moisture and lower, with light to reduce the increase, when in a kind of competition within and between species, the lotus leaf fern Adiantum the total biomass is still followed Such laws, but because the resources snatch the total biomass decreased significantly.

通過研究亚洲视频二区三区，得到以下結(jié)論：在不存在競爭的情況下97超碰公开在线，荷葉鐵線蕨與鐵線蕨隨著干旱的加劇欧美白人最猛性XXXXX69交，總生物量呈降低的趨勢(shì)日黄特一级黄色A片；當(dāng)處于同一水分含量時(shí)99久久国产超碰，隨著光強(qiáng)的增加国产毛片一区，總生物量呈增加的趨勢(shì)，LAR一般隨土壤含水量的增加而降低在线超碰，隨光強(qiáng)的增加而降低无码AA在线，當(dāng)處于種內(nèi)和種間競爭時(shí)候，荷葉鐵線蕨的總生物量仍遵循這種規(guī)律91自拍视频国产精品，但是因?yàn)橘Y源的搶奪造成總生物量明顯降低久久青草国产精品一区。

However, the key environmental factors for the topsoil (0-20cm) organic carbon lability were vegetation coverage, 20-30cm belowground biomass, 0-10cm,10-20cm and 20-30cm underground soil moisture, soil organic matter, soil labile Potassium and soil total Nitrogen content.

影響表層土壤活性有機(jī)碳含量最關(guān)鍵的環(huán)境因子是地上生物量免费黄色片999、0~10cm地下生物量、30~40cm地下生物量人人操人人干人人爱人人做、20~30cm土壤含水量在线无码观看黄片、0~20cm土壤容重、20~40cm土壤容重和土壤全N量一级大黄片欧美性爱；影響表層土壤有機(jī)碳活度最關(guān)鍵的環(huán)境因子則是植被蓋度全球持级黄毛片免费、20~30cm地下生物量、0~10cm土壤含水量一级夫妻生活a片在线观看、10~20cm土壤含水量久久精品免费福利网、20~30cm土壤含水量、土壤有機(jī)質(zhì)大家操大家日超碰、土壤速效K和土壤全N量视色4s影院在线观第一视频看。

This study was carried out in collective-owned summer grassland in Ganchaitan, which is located at the south foot of eastern Lenglongling Mountain (a branch of north Qilian Mountain), with yak and Tibetan sheep miscellaneously grazed on it. The grassland type could be classified as alpine meadow, dominated by Potentilla froticosa shrub. This study, under grads grazing stress, focused on the community structure, composition, species diversity, above-ground biomass of PFS, by using pane net sampling based on spatial distribution in stead of temporal succession. Results showed that: Grazing stress negatively related to the distance between grazing area and resident area.

以祁連山北支冷龍嶺東段南麓的甘柴灘夏季牧場(chǎng)集體長期混合放牧的高寒金露梅Potentilla froticosa灌叢草場(chǎng)為對(duì)象，利用空間分布代替時(shí)間演替的方法国产精品无码久久综合网爱天下，采用方格網(wǎng)法取樣分析調(diào)查爱情岛伦坛自拍亚州AV无码入口，對(duì)不同放牧壓力梯度下金露梅灌叢群落的結(jié)構(gòu)、組成国产古装一级牲交高潮片、物種多樣性黄片视频进入、地上生物量進(jìn)行研究，結(jié)果表明：①放牧居住點(diǎn)由遠(yuǎn)到近一级A片自慰超刺激无码，放牧壓力梯度不斷增加小18箩利洗澡无码视频网站，金露梅株高、密度91精品www、覆蓋度什么网站可以免费看A片、地上生物量和叢間草地的地上生物量均有不同程度的降低，地上的總生物量降低幅度達(dá)84.77%一级一级毛片在线看。

The present study investigatated the effect on the diversification of weed community, including weed abundance, dominance, evenness, biomass, and mean height after mulching straw and intercropping white clover in the tea plantation from 2005 to 2006. The results were as follows: 16 families and 31 species were found in total. In April, the dominant species characterized with slow growth, lower biomass, and less than 30 cm height; in July those who grow faster with higher biomass and height became dominant; In September, these malignant communities reduced, while the oxalis and diffusa characterized with lower biomass and low height gradually increased. In the three seasons, the weed abundance, community diversity and evenness increased, and the dominance, the biomass and average height of weeds remarkably reduced after intercropping white clover and muching straw.

結(jié)果表明：茶園共有雜草16科31屬31種肏屄在线观看国内，春季（4月）以生長速度較慢、生物量小大香蕉日韩亚洲网在线播放、株高在30 cm以下的雜草為主猛操视频，夏季（7月）以生長快、植株高和生物量大惡性雜草為主国产高清在线a视频大全在线，秋季（9月）惡性雜草開始減少免费黄图视频，酢漿草、白花蛇舌草等生物量小a级日韩黄片欧美、株高矮的雜草逐漸增多青草青草久热精品视频不卡；稻草覆蓋處理茶園春、夏和秋季3個(gè)觀測(cè)時(shí)期雜草物種豐富度欧美综合性爱、多樣性综合亚洲伊人午夜网、均勻度等指數(shù)均高于清耕對(duì)照国产乱伦窝边操，優(yōu)勢(shì)集中性指數(shù)低于清耕對(duì)照；間種白三葉草處理春美国xxxx69、夏和秋季3個(gè)觀測(cè)時(shí)期雜草總數(shù)量和生物量均顯著低于清耕對(duì)照美国潢色片AAAwWwA，夏、秋季雜草平均株高顯著低于清耕對(duì)照色呦呦在线视频免费观看；稻草覆蓋和間種白三葉草處理春季茶芽重和產(chǎn)量顯著高于清耕對(duì)照一级国产精品毛片视频，鮮葉中游離氨基酸含量高于清耕對(duì)照，茶葉感官評(píng)審得分高于清耕對(duì)照處理99久久国产综合精品婷婷。

In all zooplanktons, the site-occurrence-rates of Copepoda and Chaetognatha were the highest, 100% and 93.3%, and the average biomass of which were 298.56 mg·m-3 and 118.09 mg·m-3 and the summation accounted for 96.88% of total biomass. The result shows that these two species created a strong relationship with the distribution of saury fishing grounds, and their biomass can be considered as the important indicator of looking for the main saury fishing grounds.

在浮游動(dòng)物中什么视频可以看毛片，橈足類和箭蟲類占絕對(duì)優(yōu)勢(shì)，出現(xiàn)頻率分別達(dá)到100%和93.3%91精品视频网，平均每立方米生物量為298.56 mg和118.09 mg91页国产视频，其和占總生物量的高達(dá)96.88%，嚴(yán)重影響了總生物量的空間分布视频一区二区在线观看，分析認(rèn)為與中心漁場(chǎng)分布的關(guān)系最為顯著日韩夜色精品影院视频，因此可將其生物量大小作為確定秋刀魚中心漁場(chǎng)的重要指標(biāo)。

The biomass and soil organic carbon stock reduced by 24% and 10% from the first to the second rotation of Cunninghamia lanceolata plantations, respectively, and by 39% and 15% respectively from the second to the third rotation.

地力維護(hù)措施可在很大程度上防治連栽人工林生物量和土壤有機(jī)碳貯量的下降国产丝袜在线观看视频黄，2代杉闊混交林生物量和土壤有機(jī)碳貯量分別比2代純林提高69%和19%亚洲黄片视屏1234；2代按樹與相思屬樹種的混交林生物量比2代按樹純林增加29%；施肥可使2代杉木人工林生物量提高22%伊人草在线视频。

There was significant allomatric growth of Phalaris arundinacea and Phalaris arundinacea between ramets height and biomass or constituent biomass, between ramets biomass and constituent biomass in wet and drought environments. And the relationship between ramets biomass or height and ramets quantitative characteristics also followed allomatric growth for Phragmites australis and Phragmites Jeholensis in wet and drought environments.

水生生境和旱生生境生長的虉草和緊穗三棱草日本色一区二区三区，分株高度和分株生物量、組分生物量以及分株生物量和組分生物量間存在著極顯著的異速生長關(guān)系欧美激情第欧美精品；水生生境和旱生生境生長的蘆葦以及水生生境生長的熱河蘆葦乱伦亚洲色图片，分株生物量和分株數(shù)量性狀以及分株高度和分株數(shù)量性狀間存在極顯著或顯著的異速生長關(guān)系。

Taking the rehabilitation of the mangrove forest in Qi'ao Island lying near the outlet of Pearl River as an example and resorting to the growth models for large-size wetland plants,the paper quantitatively analyzes the competitive relation between Sonneratia apetala,a foreign species,and Spartina alterniflora by prefabricating three different designs.

研究表明：在有互花米草的灘涂上人工種植的無瓣海桑18岁禁看网站在线看，在其生物量小于互花米草生物量時(shí)欧美在线黄片小视频，初始生物量大的超過互花米草所需時(shí)間短于初始生物量小的；當(dāng)無瓣海桑生物量超過互花米草生物量后欧美黄片天天在线观看，無瓣海桑生長基本不受互花米草的影響717电影网理论片我不卡，同時(shí)互花米草的生物量開始下降。

The result indicated that in the low phosphorus condition, using sturdy-seeding agent which inoculates fungi of dissolving phosphorus could obviously improve the plant height, increase fresh and dry biomass of the shoots, root vigor, phosphorus content and P uptake of the shoots. In the five treatments, compared to the blank control groups, the plant height of rice seedling increases 16.81%, fresh biomass 21.28%, dry biomass 12.42%, phosphorus content 31.11% and P uptake 44.03% for the shoots, the results were good. Next was P1 and P4 treatments, especially in the P1 treatment, the dry and fresh biomass, phosphorus content and phosphorus uptake of the roots were highest than any other treatment.

結(jié)果表明男女人精品视频站在线观看，在低磷條件下，施用接種解磷菌的壯秧劑可以顯著提高水稻秧苗的株高亚洲精品一、地上部干亚洲色图五月天综合、鮮生物量、根系活力网页升级自拍偷拍、地上部磷含量和磷吸收量98在线视频，在5個(gè)處理中人人摸人人搞人人草，P2處理水稻秧苗的株高比對(duì)照提高16.81%，地上部鮮生物量比對(duì)照增加21.28%av男人的天堂综合网，地上部干生物量比對(duì)照增加12.42%黄色A八网站，地上部磷含量比對(duì)照提高31.11%，地上部磷素吸收量比對(duì)照提高44.03%久久精品视频还得看这里，表現(xiàn)效果較好少妇无码一级av专区，其次是P1和P4處理，其中P1處理的根部干日韩久久精品视频、鮮生物量www.renrenav.com、根部的磷素含量和磷素吸收量均高于其他處理。

This trend was obvious for 5-year-old plantation. The biomasses of living and dead fine roots at 0~10cm accounted for 51.9% and 53.3% of the totals, respectively. The 84.6% of living and 82.8% of dead fine roots concentrated at the depth of 0~30cm.

在0~10cm土層中的活自拍偷拍色综合、死細(xì)根生物量分別占全部活細(xì)根生物量的51.9%和死細(xì)根生物量的53.3%一级A片特爽高潮视频一，活細(xì)根生物量的84.6%和死細(xì)根生物量的82.8%分布在0~30cm的土層中。