查询词典 meadow

The following conclusions have been made in this paper.(1) Based on CO_2 flux data of eddy covariance, variation characteristics of gross primary productivity in four flux observation stations were studied, which are an alpine meadow, an alpine shrub meadow, a swamp alpine meadow and a steppe alpine meadow at Dongxiong. The results show that photosynthetic capacity of the alpine meadow is the highest, and the annual total GPP is 652.2g C/m~2. Daily-differencing approach is used to analyze the random error of CO_2 fluxes measurements. The results show that the distribution of random error follows more closely follows a double-exponential, rather than a normal distribution, capturing the high peak and thick tail, and the random error varies with environment variables, which violates the assumptions for the ordinary least squares fitting with normality and homoscedasticity, consequently, we introduce maximum likelihood method for parameter optimization.

本文主要在以下几个方面开展工作并获得了一些认知和结论：(1)通过分析样带区域内高寒草甸、高寒灌丛、沼泽化湿地和草原化高寒草甸四个通量观测站点草地生态系统总初级生产力变化特征，研究结果表明HBBT矮嵩草草甸生态系统植被光合作用能力较强，年GPP总量为652.2 gC/m~2，明显高于其他三种生态系统；通过利用"单塔日变化法"获得四站点通量观测数据随机误差，结果表明通量观测随机误差概率分布呈现尖峰厚尾的特征，与正态分布相比，更服从双边指数分布，进一步分析表明通量观测随机误差随环境变量(风速、温度和光合有效辐射)的变化而变化，这违背了普通最小二乘法进行生态过程模型参数优化正态分布且误差同质的假设，因此本研究中引入最大似然法进行生态过程模型参数优化。

In this paper,the geographical distribution,profile shape and char- acteristics of major soil types such as the young brown earth,brown earth and meadow brown earth in the eastern low-mountain and hilly region and the meadow soil,saline meadow soil and paddy soil in the western plain region in Haicheng county of Liaoning Province are diseribed;the primary physico-chemical properties,organic matter,total nitrogen,total phosphorus,total potassium,total exchange of positive ions,the content of.01 physical cl...

本文叙述了海城县东部低山丘陵区的棕壤性土、棕壤、潮棕壤和西部平原区的草甸土、盐化草甸土及水稻土等主要土壤类型的地理分布、特性、剖面性态；论述了这些土壤类型的主要理化性质，有机质、全氮、全硷、全钾、阳离子代换量、。01物理性粘粒含量等及微量元素的含量、丰缺程度。根据主要土壤类型的性质和特点，作者提出了棕壤、草甸土两大土类的合理利用意见及其改良措施。

The amount of pesticide and herbcide applied was less, the pure quantity was only 1. 9kg/ha which is about 40％ of the Jinlin Province's average. In farmland, There are 26700ha of solonetz and solonchak, and 289700ha of salinized soil with the high content of salts. The salt content in the surface is 1％-2％ in soda meadow solonetz, 1％-4％ in sulfate meadow solonetz, below 0.7％ in meadow solonchak generally, and below 1％ in salinized soil. The runoff and the return flow from above lands have high content of salt and high output load of the soluble salt.

吉林西部耕地中有2.67万hm〓的盐土、碱土和28.97万hm〓的盐碱化土地，这些盐土、碱土及盐碱化土地中均含有较高的盐分，其中苏打草甸盐土表层含盐量1％～2％，硫酸盐草甸盐土表层含盐量可达1％～4％，草甸碱土含盐量一般。7％，来自于这些土地的地表径流和农田回归水中盐分含量高，可溶盐的输出负荷大。

At the end of growing season in Songnen Plain of China, the dormancy modules of Puccinellia tenuiflora in Alkalinize meadow consisted of dormancy buds and dormancy seedlings, and dormancy seedlings were dominant both in the mowing meadow and herd meadow.

1松嫩平原生长季末期，碱化草甸星星草的冬眠构件是由冬眠芽和冬眠苗组成，割草地和放牧地星星草种群均以冬眠苗占优势地位。

The effect of Zea mays and Bromus riparius on soil and water loss were studied,the experiment was conducted to plant crop and grass in runoff-plots on the 15 degree slope naturally,the bare slop is CK,then the runoff and soil erosion amount and the biological characteristics of corn and meadow bromes termly were measured,and difference of soil and water loss prevention effect on the slop land were determined.The results showed that soil and water loss became less after both corn and meadow brome planting.And the leaf area and the coverage of meadow brome higher than corn,which was benefit for less soil and water loss at the rain season early.Meanwhile,roots of corn and meadow brome mainly distributed in 0-10 cm soil layer,and the root biomass of meadow brome was 2.88 times than that of corn.

试验在自然降雨条件下，在15°坡地设置作物与牧草径流试验小区，以裸地为对照，在每次降雨之后用全深剖面采样器取样，测量其径流量和土壤侵蚀量，定期测定玉米和草地雀麦的生物学特性，研究玉米与草地雀麦生物学特性变化及其坡地水土流失防治效果的差异，探索植物种植对坡地水土流失的主要影响因素，结果表明：种植玉米与草地雀麦，对坡地水土流失均有一定防治作用，但是，与玉米相比，草地雀麦的叶面积指数和覆盖度可在雨季前达到较高水平，有利于早期坡地水土流失防治。

The meadow is suitable for feeding cattle and sheep.

休养所前有一片网球场。meadow指天然的草地，用于放牧牛羊。

Also Rebecca from Meadow Brook in Arizona sent me a nice letter with lovely drawings.

也感谢来自亚利桑那州Meadow Brook的Rebecca，她也给我寄了一封有漂亮图片的信。

It was same that three indexes of activity intensities trended in four types of habitats. The activity intensities of root vole on four types of habitats were in ascending order of the manual cultivated land, true meadow, swamp meadow and D. fruticosa shrub. Three indexes of activity intensities were different significantly between each two types of habitats, except the runway length and runway branch number between the true meadow and swamp meadow.

除了跑道长度和跑道分叉数在真草甸和沼泽化草甸间差异不显著外，3活动强度变量在不同类型栖息地间均差异显著，而且变化趋势一致；根田鼠对4类栖息地的利用强度从大到小依次为金露梅灌丛、沼泽化草甸、真草甸、人工耕作地。

And than the soil water contents of mountainous meadow was intervenient. The diversification of soil bulk density was completely reverse with the soil water contents. The soil bulk density of alpine meadow and sub alpine meadow was evidently lower than hilly meadow steppe and alluvial flat meadow steppe.

高山和亚高山草地类型的土壤含水量明显高于低山丘陵和河滩阶地的类型，而中山类型的草地土壤含水量在它们中间；土壤容重的变化趋势则完全相反，高山和亚高山草地类型的土壤容重明显低于低山丘陵和河滩阶地的类型。

The soil water contents of alpine meadow and sub alpine meadow was evidently higher than hilly meadow steppe and alluvial flat meadow steppe.

随着海拔高度的上升，共有种逐渐减少，β多样性增加，物种替代速度逐渐增大。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。