干旱地区

We decide the fit breed of each place according to the geographical and periodical seeding experiments: FD1 like gongnongyihao fits the drought-cold areas such as Changling; FD3-5 like Haygrazer, Vector, Key etc fit the Huabei area such as Beijing and Taiyuan; FD6~8 like Lobo, Durango Eclogue, Titan802 etc fit the middle and lower reaches of Yangzi river such as Zhengjiang.3.During the course of climatic ecology division of alfafa, accumulated temperature above 5℃ is used as the main index, by gradually division, the whole country is divided into 6 climatic zones, namely Northeast zone, Huanghuai zone, Yangzi river valley zone, Northwest of Mongolian zone , Qingzang altiplano zone and unfit zone of South China. In each climatic zone, based on the main and secondary indexes, the climatic zones is divided into second climatic ecology regions, such as north of Xinjiang region, south of Xinjiang region and south of Tibet region etal, total 21 regions.

地理分期播种试验，确定了各地适合品种：以长岭为代表的干旱高寒气候适合种植秋眠1级品种，如公农一号；以北京和太原为代表的华北地区适合种植秋眠级3～5级的品种，如Haygrazer、Vector、Key等；以镇江为代表的长江中下游地区适合种植秋眠级6～8级的品种，如Lobo、Durango、牧歌、巨人802等品种。

North-West China is an arid region where the saline soil is widely distributed, and therefore is rich in halophyte plants.

中国西北地区是我国干旱、盐碱化土壤分布面积较广、土壤积盐较重的地区，这里发育着丰富的盐生植物。

Under the invariable air temperature and sunlight, the relatively high precipitation influences on vegetation mainly distribute in semi-arid and arid regions. The analysis on lag correlation coefficient indicates: vegetation activities are mostly influenced by precipitation and the influence has a delay of 20 days.

从华南经华东到华中地区，随着年积温的降低，绿度始期变化不大，绿度末期提前趋势明显，绿度期逐渐缩短；由华北、陕晋经内蒙至西北地区，因水分条件的变化，干旱指数逐渐增大，绿度始期逐渐推迟，绿度末期大致提前，植被绿度期逐渐缩短。

For example, in colder soils of the American corn belt and drier areas of the Argentine pampas, banding is the preferred method for phosphate fertilization.

如在美国"玉米带"的寒冷地区和阿根廷的干旱热带草原地区，条施是磷肥施用的优选方法。

So we made the tests of ecophysiology of citrus in the red soil which contain different amount of water in the typical red soil region of China from 2003 to 2004. This project was also put in practice together with the economic irrigation project which was supported by National High Technology Research and Development Programe of China ("863").Two-year potted plants and 9-year mature satsuma mandarin trees Citrus unshiu Marc.cv.

为探索柑橘在不同红壤水分状况下的生理生态要素变化特征和机理，或为减轻红壤干旱对柑橘生长的伤害和对产量、品质的负面影响，或为红壤地区柑橘果园节水灌溉提供理论依据，本文结合国家"863"高技术研究发展计划农业节水专项(2002AA2Z4331)的实施，于2003-2004年在中国典型红壤地区进行了不同红壤水分条件下柑橘的生理生态反应试验。

The xeromorph weeds are the most damage weeds to rice during the first fastigium,while the water weeds are dorminant types in the second fastigium.

近些年北方地区常年出现季节性干旱，导致水稻生产不稳定，有些年份个别地区甚至导致水田弃耕。

Around New Year's Day and in the second ten - day period and the last ten- day period of February in 1996, radiation frost and strong advective weather occurred successively and resulted in large reduction of output of longan, litchi, banana, and pineapple in Guangxi.

树体、花序受寒害和花期高温干旱，是导致1996年广西龙眼、荔枝、香蕉、菠萝等4种水果大幅度减产的主要气候原因。霜冻与地形地势有关，以桂西南石山地区为重，该地区局部低洼地龙眼、荔枝树被冻死。

The northern part of Alabama is described as the driest in about 100 years.

阿拉巴马州的北部地区被形容为100来最干旱的地区。

The northern part of Alabama is described as the driest in about 100 years.

阿拉巴马州的北部地区被认为是近100年来最为干旱的地区。

The northern part of Alabama is described as the driest in about 100 years.

阿拉巴马州的北部地区被称为100年来最干旱的地区。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。