查询词典 drought

The potted seedlings of Ailanthus altissima S.,Ginkgo biloba L.and Robiniapseudoacacia L.was treated by soil drought stress to study changes of chlorophyll afluorescence parameter under drought stress.

采用对盆栽臭椿、银杏和刺槐苗木进行土壤干旱胁迫处理的方法，研究干旱胁迫对植物叶片叶绿素荧光动力学的影响。

In a certain period, the probability and expected value of critical drought duration got larger with the in crease of first-order auto-correlation coefficient and skewed coefficient, especially with first-order autocorrelation coefficient. The return periods of consecutive 11-year drought in North Luo River and Jing River were 1000 years.

在一定时期内，极限水文干旱历时的发生概率和数学期望随一阶自相关系数、偏态系数的增加而增大，且一阶自相关系数对极限水文干旱历时概率分布影响较为显著；泾河和洛河发生连续11年干旱的重现期均为1000年。

Exploring novel genes and gene combinations are of primary importance in plant drought-tolerance and water-saving research. Based on the EST sequence of MYB gene obtained in the research on molecular basis of drought-tolerance and water-saving in broomcorn millet Panicum miliaceum L.

根据在糜子抗旱节水分子基础研究中获得的一个糜子 MYB 基因的EST序列，以其序列及水稻MYB18基因的序列为基础设计引物，扩增得到1 739 bp的全长基因组序列。

The Φ(subscript PSⅡ), Fv/Fm and qP were increased but qN was decreased with increasing of chlorophyll a, the rate of heat dissipation was increased with the increasing of chlorophyll b, and the carotinoid increasing enhanced the rate of heat dissipation of dryland and carbon assimilation of irrigated cultivar The Φ(subscript PSⅡ) and qN of dryland cultivar treated by control were higher than that of irrigated cultivar in jointing stage significant, indicating that the characteristics of drought-resistantce of winter wheat could be displayed in the jointing stage, and the drought-resistant capability could be increased by enhancing the practical photochemistry efficiency and heat dissipation in jointing stage.

拔节期对照处理的旱地品种的Φ和qN显著高于水地品种，在该时期品种抗旱性差异表现较为明显，能够通过提高光合机构实际光化学效率和热耗散来增强光合机构对干旱的适应能力。

Scientists will be screening chickpea and wheat collections in Pakistan for traits of economic importance for farmers; characterizing rare coconuts in Sri Lanka for traits of drought tolerance and tolerance to other pests and diseases; screening for salinity tolerance in sweet potatoes in Peru; and identifying drought-tolerant bananas in India.

科学家们将筛选鹰嘴豆，小麦收藏在巴基斯坦的性状的经济重要性的农民；特点罕见的椰子在斯里兰卡的性状的耐旱性和容忍其他害虫和疾病；筛选耐盐性的红薯，秘鲁，并确定乾旱容错香蕉在印度。

The drought or flood circulation index in North China shows well the anomalous general circuiation features of interannual variations of flood and drought in summer over North China.

夏季华北干旱环流指数的变化很好地反映了华北地区夏季湿润或干旱气候年际变化的大气环流异常特征。

Coleoptile length were observed in different varieties, and the differences among varieties were consistent under different simulated drought stresses, therefore, coleoptile length could be used in the evaluation of drought in wheat at the early stage.

在不同程度的干旱胁迫处理下，各品种的胚芽鞘长度变化趋势大致相同，因此利用胚芽鞘长度可以在早期对小麦的抗旱性进行鉴选。

And the drought period and flood period isolines of risk index are separately similar to the drought period and flood period concentration isolines of carbon tetrachloride,and the risk areas of drought period and flood period also have a similar distribution.

当今广泛应用的风险评价模式包括危害判定、剂量效反应评估、暴露量评估和风险表征四个部分，健康风险评价在世界各国都得到一定的应用[2]。

In view of the instance that a single index can not depict the drought/flood anomaly distribution accurately, this paper utilizes combined three-index to compartmentalize annual drought/flood pattern in term of the most noticeable feature, and then presents a new table of 531-yr summer drought/flood pattern in eastern China.

鉴于单个指标存在难以准确刻画旱涝分布的局限性，采用3种指标相结合的方法，依据最突出特征原则对逐年旱涝分布进行定型，从而得到了新的中国东部夏季旱涝型年表。

The tree α-cellulose δ^13C time series from 1835 to 1997 was obtained based on cross-dating tree rings age from the Tianmu Mountain, Zhejiang Province. After removing the long-term decrease trend, which is related to atmospheric CO2 concentration of the δ^13C series, we analyzed the correlation between the δ^13C and the flood/drought index of different periods. The results suggest that both the same year and the next year tree ring δ^13C are distinctly related with the spring and summer drought indices, showing that the δ^13C better responsed to the spring and summer flood/drought.

对采自天目山的柳杉树轮进行交叉定年后，测得树轮的δ^13C年序列，将δ^13C去除大气CO2趋势影响后的高频变化与不同时段的旱涝指数进行相关分析，结果显示：春夏季的旱涝指数与当年和滞后一年的δ^13C序列有着比较显著的相关性，表明树轮δ^13C对春夏季旱涝的发生有着比较好的响应。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了