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(dòng)差為基礎(chǔ)的不一致、異質(zhì)性及適合度(goodness-of-fit)估量評(píng)估同一區(qū)域之乾旱資料是否一致及均勻亚洲日韩第三四页，并選取一合適的區(qū)域乾旱量及乾旱延時(shí)機(jī)率分布函數(shù)国产偷出轨精品免费视频。

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%、 80.8% and 74.2% respectively compared to steppe, and the indices of species richness, diversity and evenness decrease by 76.4%av黄片国内、 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

旱龍灣湖泊沼澤化過程大致經(jīng)歷了以下階段：(1)旱龍灣火口湖湖泊形成階段(3，300-2av永久天堂一区二区三区香港，250 aBP)欧美图片自拍；(2)旱龍灣湖泊發(fā)育階段(2，250-2亚洲欧美日韩精品久久不卡，100 aBP)在线看片91；(3)旱龍灣湖泊沼澤化伊始(2，100-1摸下面嗯啊网站，500 aBP)美女被狂cao；(4)旱龍灣沼澤化擴(kuò)大發(fā)育階段(1，500-750 aBP)台湾乡下A片免费看；(5)富營養(yǎng)泥炭沼澤階段(750-24 aBP)国产麻豆视屏；(6)富、中營養(yǎng)泥炭沼澤階段(24 aBP-今)A一级毛片A一级黄片。

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.

結(jié)果表明久久免费影院，水稻土的適宜耕層厚度為15 cm左右，旱耕地適宜耕層厚度應(yīng)不低于20cm黄色稳定视频资源在线观看；成土母質(zhì)對(duì)產(chǎn)量的影響以河湖沉積物母質(zhì)最好黄色免费a片短视频，稻田以板頁巖母質(zhì)最差，旱耕地以紫色砂頁巖母質(zhì)最差日韩美女福利网址在线观看视频免费；水稻以酸性土最好欧洲激情一区二区三区视频，旱作以中性土最好；研究區(qū)稻田有35.2%的存在障礙層天天综合色一级毛片，且多為中中文字幕网第一页、高位障礙，是影響水稻產(chǎn)量整體提高的主要因素色色色色色色色色色色色色色色色色色色色色；水稻和旱作都以壤土為最好中文字幕日韩精品视频一区，其中，稻作怕砂黄污视频免费网站，旱作怕粘激情图区自拍偷拍；水稻土適宜的容重為1.00—1.29 g/cm~3爱搞精品。

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(píng)估理論與方法論文根據(jù)旱作節(jié)水農(nóng)業(yè)的特點(diǎn)，界定了旱作節(jié)水農(nóng)業(yè)的經(jīng)濟(jì)效益国产精品亚洲一级视频、社會(huì)效益小蝌蚪www、生態(tài)效益及其綜合效益，在此基礎(chǔ)上情草视频在线，構(gòu)建了北方旱區(qū)旱作節(jié)水農(nóng)業(yè)綜合效益評(píng)價(jià)體系黄色网站啊啊是视频在线免费看，包括：評(píng)價(jià)的理論模型，指標(biāo)體系天天操天天怕天天日天天、評(píng)價(jià)方法和評(píng)價(jià)程序国产99r视频精品免费观看。

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.

為了篩選小麥-旱麥草異附加系、異代換系国内外激情视频在线播放，對(duì)普通小麥品種Fukuho×東方旱麥草屬間雜種的BC2F3代材料的96粒種子進(jìn)行了染色體數(shù)目的檢測黑丝美女被强奸网站，共檢出15粒2n=43的種子，8粒2n=44的種子狼友在线免费，進(jìn)一步對(duì)以上材料進(jìn)行的基因組DNA原位雜交一级啊啊啊大舒服免费观看视频，共鑒定出3個(gè)單體附加系，2個(gè)二體附加系九九线精品视频，1個(gè)雙單體附加亚洲视频小说，1個(gè)小麥三體單體附加，1個(gè)附加3條東方旱麥草染色體的小麥單體我把姪女日出水了在线看，在染色體數(shù)為42的個(gè)體中人人干人人操色，檢測出1個(gè)單體代換，1個(gè)雙單體代換www.人人莫人人。

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(xué)術(shù)界對(duì)以火田耕種為代表的旱作農(nóng)耕文化關(guān)注的大背景下超碰欧美图片zxxxx，坪井洋文從民俗學(xué)的學(xué)科角度出發(fā)，通過對(duì)&芋頭正月&中文字幕av有码高清片久久、&日本人為何選擇了稻米&的思考日韩污视频，推論了旱作農(nóng)耕文化體系的存在，從同等價(jià)值的多元論體系確立了&年糕正月&對(duì)&芋頭正月&又粗又大又硬的黄片、稻作農(nóng)耕民文化對(duì)旱作農(nóng)耕民文化的民俗文化多元論學(xué)說一级在线观看免费影片一。

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(duì)引進(jìn)的水稻品種進(jìn)行旱直播種植，篩選結(jié)果表明精品视频三级片，龍粳2號(hào)和龍粳3號(hào)適宜旱直播種植免费的美女色视频网站A，產(chǎn)量可達(dá)5 872和5 783 kg/hm2，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巨乳在线播放视频。

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)狀和存在問題免费一级无码婬片AA片昌最新，在總結(jié)多年來旱作農(nóng)業(yè)技術(shù)效果的基礎(chǔ)上国产鲁鲁精在线，結(jié)合我省區(qū)域特點(diǎn)gogo国模啪啪人体，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)化日本精品AA片在线播放、組裝人人操人人色威尼斯、配套，以小麥玉米為參試作物岛国片在线网址，進(jìn)行優(yōu)化篩選免费人成年A片在线观看，探索具有陜西特點(diǎn)的旱作節(jié)水技術(shù)模式，并對(duì)陜西旱作節(jié)水農(nóng)業(yè)的發(fā)展提出若干建議国产黄色。

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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