查询词典 meadow clover

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。

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。

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。

Through the diversity investigation of weed in large area of white clover seed production atMaming （1）In the seed production of white clover in large area, by the growing of white clover, the species and quantity of weed are increasing rapidly;（2） Because the growth speed of white clover is slower than other grass in the seeding year,the early field management is effect to prevent the fast growth of the weeds.

通过对农业部白三叶种子生产项目在云南省马龙县马鸣乡大面积生产中杂草的多样性调查，结果表明：（1）在白三叶种子大面积生产中，随着白三叶的生长，田间杂草的种类和数量逐步增加；（2）由于在白三叶播种当年其生长速度不快，因而在其生长前期应适时除杂，以防止杂草的迅速生长。

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。

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。

Key forage plants consist of alfalfa, erect milkvetch, tall fescue, perennial ryegrass, crownvetch, white clover, red clover alsike clover, common orchardgrass, smooth brome; planting divisions with obviously optimal combinations of forage plants in Henan province cover the following 6 respects:（1）Northern plain forage planting division;（2）North-west mountain area forage planting division;（3）Middle-east low lying plain and nan-yang basin forage planting division;（4）Western mountain area forage planting division;（5）Huaihe river-south and Tongbai mountain area forage planting division;（6）Eastern plain forage planting division;These conclusions will provide necessary theoritical data or base for right choose of foeage plants as well as great development of grass industry in the future in Henan province.

结果表明：适合河南省的当家草种有10种，分别是：紫花苜蓿、沙打旺、苇状羊茅、多年生黑麦草、小冠花、红三叶、杂三叶、鸡脚草、无芒雀麦；适合河南省草业优质发展的草种区域有6个，分别是：豫北平原牧草种植区、豫西北黄土丘陵和太行山地种植区、豫中东低洼平原和南阳盆地种植区、豫西山地种植区、淮南与桐柏山区种植区、豫东平原种植区，并且明确了各区域内以当家草种为核心的草种优化组合。河南省当家草种的制定和草种区划的确定有利于为河南省各地草种的正确选择和草业未来大发展提供理论依据。

Yes, for those looking for a four-leaf clover of the country children, four-leaf clover 100% in their four-leaved clover.

是的，对于那些寻找着四叶草的乡下孩子来说，四叶草百分之百地是他们的幸运草。

In fact, the hop clover, white clover, and red clover, and a plant known as black medick, are commonly displayed as shamrocks.

实际上，蛇麻草，白色三叶草，红色三叶草以及一种叫做黑色苜蓿草的都被当做三叶草来展示。

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。

This immediately brings us to the next part of this article: creating an output "replace function".

下面进入文章的第二部分：建立一个"缓存处理函数"。

He was elected as an International Ornithological Committee member in 2002 during the 24th IOC held in Beijing.

现为中国鸟类学会理事和WPA 专家组成员。2002年被推选为国际鸟类委员会委员。