drought field 中文意思是什麼
drought field
解釋
受乾旱的田-
As a result it enhanced the water - retaining and fertility - retaining capacity, strengthened the anti - scour and anti - erosion ability. 3. sabaigrass can meliorated the little entironment of purple soil bare slope field the results show that sabaigrass treatment and grass tree solid plating treatment can reduce n ( nitrogen ), p ( phosphorus ) and k ( potassium ) erosion, increase soil nutrition element content, it also increase soil water content and soil pondage, decrease soil water evaporation, strengthen the anti - drought ability
龍須草能改善紫色土荒坡地的小生境龍須草純種植被和林草立體種植植被能不同程度地增加土壤的有機質和速效n 、 p 、 k的含量；增加土壤含水量和貯水量，減緩和減少土壤的水分蒸發，增強土壤的抗旱能力；降低土壤盛夏的地表最高溫度，減少地表溫度變化幅度。 -
In ported trials, wu gave the minimum tr of all plants, and its diurnal maximum tr persisted stability the most within the range of soil moisture 20. 4 % - 6. 4 %. ; nx lowered its tr and shrank its high - low lines after had experienced irregular wet - drought hardening period during culturing ; kerqin performed a plasticity as compared to field ; c. lanata also stood the most stability but on the basis of middle - high maximum tr level ; tr by caragana korshinski was high when soil water was abundant, but was lowest for lack of water ( 6. 4 % )
盆栽試驗表明，華北駝絨藜蒸騰最弱，且在土壤含水量20 . 4 6 . 4的范圍內最高蒸騰速率穩定性最強；經脅迫鍛煉寧夏駝絨藜蒸騰降低，變幅減小；科爾沁駝絨藜與大田相比蒸騰可塑性較強；土壤水分變化中，北美駝絨藜蒸騰在中高水平上維持穩定的能力最強；水分良好時檸條蒸騰很強，水分脅迫中蒸騰極大降低。 -
According to the idiographic complexion of our country, the article elucidated the connotation of conservation tillage : it ' s a technology of tillage with minimum tillage or no - tillage so as to reduce the soil ' s disturbing, using stalk cover the field so as to decrease laboring and tillage ' s cost, preventing wind & water erosion, and improving the fertility of soil and the ability of fight a drought
摘要根據保護性耕作在我國的實施情況並結合國外已有研究結果，我們認為保護性耕作的內涵為：保護性耕作措施就是對農田實行少耕或免耕，盡可能減少對土壤的擾動，並以秸稈覆蓋地表，達到減少勞動強度和生產投入，防止農田風蝕和水蝕並提高土壤肥力和抗旱能力的一種農田耕作技術。 -
Using monthly mean rainfall and temperature data in north - west of china ( nwc ), the characteristics of rainfall anomaly at rainy season in nwc and the inter - annual varieties of drought / flood are diagnosed by means of eof, reof and wavelet analysis et al. and the ncep / ncar monthly reanalyzed data are employed to analyse the evolution character of water vapor flux and it ' s divergence flux, 500hpa height and u, v wind field. results show that ( a ) the space distribution of rainfall anomaly can be separated into seven climate sensitive areas, the first and the third region have the same rought / flood trend
本文使用西北（區） 168個站1961 2000年6 9月（主汛期）月平均降水、溫度資料，運用eof 、 reof 、小波分析等方法診斷了主汛期月降水異常和旱澇的年代際變化；同時利用ncep ncar月平均資料，分析了強（弱）季風年西北空中水汽通量及其散度場、 500hpa高度場、 u 、 v風場的演變特徵，結果表明： （ a ）西北汛期降水可分為七個氣候異常區，第一、三異常區旱澇趨勢相同。 -
Field and potted trials were adopted. drought adaptive characteristics were tested mainly on dehydration resistance ( dre ) of detached branchs and transpiration rate ( tr ). a new method called turning point ( tp ) was suggested
試驗在呼和浩特進行，以駝絨藜屬植物為主要研究對象，採用大田試驗和盆栽試驗法，主要從離體枝的脫水速率和葉片蒸騰速率兩個方面探討了耐旱性反應或特徵。 -
This work aims at studying multi - scale structures of large - scale stratiform precipitating clouds typical of henan province of central - eastern china in spring and autumn drought periods of china, the potentials and techniques of artificial rain increase. through analysis of historical weather / climate and cloud physical data, developed are a number of multi - scale observational schemes including intensive observational items, and space / time resolutions of data for integrative field observations to obtain real - time measurements of the structures at large -, medium -, small - and micro - scale. from analysis of observed separate items, their integrative treatment and numerical simulation we place focus on case studies and their integration in investigating such structures of stratiform precipitating clouds over the target region, rainfall physical mechanisms and exploitation of artificial rainfall increase potentials, whereupon a conceptual model is constructed and a range of catalysis schemes are proposed to improve smaller - scale forecasting accracy and techniques for the rainfall increase, with the dominant results given below
以地處中原、具有典型代表意義的河南層狀降水雲系為主要研究對象，在對該地歷史天氣氣候和雲物理等資料分析的基礎上，研究設計雲系多尺度觀測方案（包括加密觀測項目、觀測時空解析度） ，實施有設計的外場綜合觀測，獲取雲系結構多尺度（大、中、小、微）配套的實時觀測資料；通過對各種觀測資料的分項和綜合處理分析，以典型個例觀測和數值模擬分析研究為重點，綜合多個例分析，研究河南層狀降水雲系多尺度宏微觀結構特徵、降水物理機制和人工增雨潛力條件，建立典型層狀雲系人工增雨概念模型，研究科學的人工增雨作業技術系統。 -
We classified flood and drought years of summer and autumn, it is pointed out in the paper that there are circulation anomaly in 500mb height field before flood or drought years. we also find out that there are intimated relation between autumn floods and droughts of zhejiang province and the macro - scale rain belt. the meteorological elements emergence abnormal features in summer before flood and drought years. we make out predictor to predicate summer precipation
論文結合三種排序方法劃分了夏秋旱澇年，研究表明，夏季、秋季旱澇年前期冬季和夏季500hpa高度場環流有明顯的異常特徵，夏秋旱澇與我國夏秋大尺度天氣氣候異常有密切的關系，旱澇前期我國氣象要素場有明顯的異常特徵。製作了浙江省夏季旱、澇預報工具。 -
In addition, drought - stress trials in field proved that the capability of drought - resistance of the transgenic tobaccos were improved
田間抗旱試驗結果證明轉基因煙草的抗旱性得到了增強。 -
Drought is one of the most serious meteorological disaster in china. there are different definition and index of drought in different field. because of the complexity of drought and the universality of its influence, most of the existent drought indexes have limitation in speciality and regionally application
乾旱是我國危害最為嚴重的主要氣象災害之一。不同領域對乾旱的定義不同，所制定的乾旱指標也不同，由於乾旱的復雜性和影響的廣泛性，現有的大多數乾旱指標考慮因素少、專業性和地域性較強。 -
By using wavelet and bandpass filter methods, the different characters of low frequency oscillation ( lfo ) of olr and wind field for eight anomalous flood / drought years in middle and low reaches of yangtze rivers during may - august are investigated
應用小波變換與帶通濾波等方法分析了80年代以來長江中下游地區夏季8個典型旱澇年份的olr場、風場的低頻特徵及旱澇年位勢高度場的差異。
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