These two drought characteristics are considered for regional drought frequency analysis in this study. The L-moment based discordancy, heterogeneity, and goodness-of-fit measures are used to detect the unusual sites and select the regional probability distributions of droughts.

其次利用以線性動差為基礎(chǔ)的不一致WWW·日本熟妇人色视频、異質(zhì)性及適合度(goodness-of-fit)估量評估同一區(qū)域之乾旱資料是否一致及均勻色色综合天天色，并選取一合適的區(qū)域乾旱量及乾旱延時機率分布函數(shù)一级做a爰黑人又硬又粗视频。

Vegetation ecotype tend to be xerophyte and even hyper-xerophyte and finally replaced by annual plant. Community structure and species diversity also decrease as the ecological environment worsen, In this process, the height, coverage and biomass decreases by 56.6%91福利精品自拍视频导航、 80.8% and 74.2% respectively compared to steppe, and the indices of species richness, diversity and evenness decrease by 76.4%999Av天堂网、 56.7% and 32.0%, but β diversity indices increase by 14.6 times, especially the decease of species gregariousness and the breadth and overlay of species Niche shows that grassland tend to be more sandy and vegetation retrogression succession take place.

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The process of terrestrialization of Hanlongwan lake mainly come through some phases as follows:(1)the phases of the lake's formation (3,300-2,250a BP);(2)the phases of lake's development (2,250-2,100a BP);(3)the beginning of terrestrial of Hanlongwan

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The result indicated that suitable thickness of paddy soil is about 15cm,and for dry arable land it should not be lower than 20cm;The alluvial rivers parent material is the best one to influent the output,the rice fields is the worst with the parent material of slate ground,while the dry and plough land is the worst for its purple sand shale parent material;The paddy rice is best with the acid soil,and the dry crop is the best with the neutral soil;The obstacles horizon exist in 35.2%of the rice fields in research region,and many for middle or top digit obstacles.

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The system includes model, index system, appraisable method and appraisable procedure.2. Applying the system of multi-effect appraisement of DWSA, the paper appraised the recent decade multi-effect of DWSA in Shouyang county, Shanxi province. Appraisement result showed that the multi-effect of DWSA in Shouyang presents the climbing trend. The economic and social effects of DWSA show the obvious climbing trend.

論文主要成果包括：(1)初步構(gòu)建了旱作節(jié)水農(nóng)業(yè)綜合效益的評估理論與方法論文根據(jù)旱作節(jié)水農(nóng)業(yè)的特點，界定了旱作節(jié)水農(nóng)業(yè)的經(jīng)濟效益美日韩国产综合一区www、社會效益婷婷五月情、生態(tài)效益及其綜合效益，在此基礎(chǔ)上一夲道一区二区免费视频，構(gòu)建了北方旱區(qū)旱作節(jié)水農(nóng)業(yè)綜合效益評價體系先锋影音资源小说，包括：評價的理論模型，指標體系黄网站色视、評價方法和評價程序黄色视频免费观看日本欧美www。

Orientale additional and substitutional lines. chromosome number of 96 BC2 F3 individuals were accounted. Fifteen plants with 2n= 43 and eight plants with 2n= 44 were checked out. GISH results of the individuals with 43 chromosomes showed that they blonged to three different monosomic additions. Two disomic additions, ine double-monosomic addition, one trible- monosomic addition and one monosomic addition were found in the 2n = 44 individuals. One double-monosomic substitution and one monosomic sustitution were obtained.

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Against the background of drying farming culture which is characterized by field burning cultivation, Tuboi Hirofumi reflected on "taro New Year" and "the causes of Japanese choosing rice" from the perspective of folklore, reasoned out the existence of farming system, and established the pluralism theory of "rice cake New Year" vs.

在日本學術(shù)界對以火田耕種為代表的旱作農(nóng)耕文化關(guān)注的大背景下，坪井洋文從民俗學的學科角度出發(fā)亚洲无码视频亚洲人的网站，通過對&芋頭正月&操学生妹视频在线观看、&日本人為何選擇了稻米&的思考，推論了旱作農(nóng)耕文化體系的存在高h一区，從同等價值的多元論體系確立了&年糕正月&對&芋頭正月&日日插日日操、稻作農(nóng)耕民文化對旱作農(nóng)耕民文化的民俗文化多元論學說。

The results showed that the varieties Longjing2 and Longjing3 were adaptable to dry direct seeding, and their yields could reach 5 872 kg/hm~2 and 5 783 kg/hm~2 respectively, which could be used as draught- and water conservation seeds planted in spring in northest.

對引進的水稻品種進行旱直播種植先锋影音资源AV网站，篩選結(jié)果表明久久精品国产福利国产秒，龍粳2號和龍粳3號適宜旱直播種植，產(chǎn)量可達5 872和5 783 kg/hm2小黄片福利视频，可作為東北稻區(qū)春季抗旱節(jié)水栽培的旱直播水稻用種人妻综合一区视频。

This research makes a general survey of the domestic and international drought and economizes on water and analyses development and utilization and problems of water resource in Shaanxi.

本研究縱觀國內(nèi)外旱作節(jié)水的發(fā)展趨勢，分析陜西水資源的開發(fā)利用現(xiàn)狀和存在問題A片免费看一区二区三区免费网站，在總結(jié)多年來旱作農(nóng)業(yè)技術(shù)效果的基礎(chǔ)上中文无码精品久久高潮喷水，結(jié)合我省區(qū)域特點亚洲一区二区在线曰日韩在线，將傳統(tǒng)旱作技術(shù)和現(xiàn)代農(nóng)業(yè)節(jié)水技術(shù)集成、優(yōu)化爱爱无码免费视频、組裝www色色色色色色com、配套，以小麥玉米為參試作物亚洲区视频，進行優(yōu)化篩選被操到喷水视频，探索具有陜西特點的旱作節(jié)水技術(shù)模式，并對陜西旱作節(jié)水農(nóng)業(yè)的發(fā)展提出若干建議色视频网站在现观看。

In wetter habitats, hygromeso-and hygrophytes were more abundant and accounted for the majority of aboveground biomass, whereas xero-and mesoxerophytes became more important in dryer habitats; the mean δ〓C values of xerophytes was the highest, and those of meso-, hygromeso-and hygrophytes the lowest; From xerophytes to hygrophytes, their proline content markedly increased.

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arid soil：干旱土 旱境土

arid 干旱的,貧瘠的 乾旱 Y | arid soil 干旱土 旱境土 Y | arid zone 干旱帶 乾旱帶 Y

carvone：香旱芹酮

香旱芹[草(之上)+孟]酮 carvomenthone | 香旱芹酮 carvone | 香旱芹酮肟 carvoxime

xeromorphic hygrophyte：旱生形態(tài)的濕生植物

旱生中生植物 xero-mesophyte | 旱生形態(tài)的濕生植物 xeromorphic hygrophyte | 旱生性中生植物 xeromorphic mesophyte

xeromorphic mesophyte：旱生性中生植物

旱生形態(tài)的濕生植物 xeromorphic hygrophyte | 旱生性中生植物 xeromorphic mesophyte | 旱生構(gòu)造 xeromorphic structure

Tropaeolum L：旱金蓮屬

一一一、旱金蓮科Tropaeolaceae | 362.旱金蓮屬Tropaeolum L. | 362-1 旱金蓮T.majus L.

xerophilous：喜旱的

xeromorphism 旱性形態(tài) | xerophilous 喜旱的 | xerophyte 旱生植物

xerophilous plant：旱生植物

xeromorphism 旱生形態(tài) | xerophilous plant 旱生植物 | xerophilous plants 喜旱植物

xerophilous plant：喜旱植物,適旱植物

xerophyte 旱生植物 | xerophilous plant 喜旱植物,適旱植物 | xeroll 干熱軟土

xerophilous plant：適旱植物;喜旱植物

xerochore 沙漠區(qū) | xerophilous plant 適旱植物;喜旱植物 | xerophyte 旱生植物

xeromorphy：旱生形態(tài);耐旱形態(tài)

"旱生形態(tài)性;耐旱形態(tài)性","xeromorphism" | "旱生形態(tài);耐旱形態(tài)","xeromorphy" | "乾燥石生群集","xero-petrophytia"