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Effect of hormonal status and metabolic changes of restricted ewes during late pregnancy on their fetal growth and development

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Science China(Life Sciences) 2007年第6期50卷 766-772页

作者： GAO Feng1, HOU XianZhi1 & LIU YingChun2 1 College of Animal Science and Animal Medicine, inner mongolia agricultural university, Huhhot 010018, China 2 College of Biotechnology and Bioengineering, inner mongolia agricultural university, Huhhot 010018, China College of Animal Science and Animal Medicine Inner Mongolia Agricultural University Huhhot China College of Biotechnology and Bioengineering Inner Mongolia Agricultural University Huhhot China

This study investigated the effects of hormonal status; metabolic changes of restricted ewes during late pregnancy on the ovine fetus growth; development. One hundred mongolian ewes, synchronized for oestrus; mated, were divided into three groups; offered 0.175 MJME·kgw[0.75]·d[1] (Restricted Group 1, RG1), 0.33 MJME·kgw[0.75]·d[1] (Restricted Group 2, RG2); ad libitum access to feed (Control Group, CG) during their late pregnancy respectively. The results suggested that with the supply of exogenous energy decreasing during late pregnancy, maternal body weight; net body weight loss in RG2; RG1 were lower than those of CG (Ps0.01). The insulin; IGF-1 concentrations of ewes in RG2; RG1 tended to be lower than those of CG (P>0.05), but the GH concentrations in RG2; RG1 were enhanced; there was significant difference between RG1; CG on d 120 of gestation (P0.05). However, the NEFA; FAA concentrations of ewes in RG1 were reduced from d 90 to d 120 of gestation, then enhanced from d 120 to d 140 of gestation. During the late pregnancy, with the supply of nutrition decreasing, the negatively physiological; biochemical maternal reactions to restriction became worse, which significantly reduced the average lamb birth weight; daily growth rate of fetus in RG2 (P<0.05); RG1 (P<0.01).

关键词： late pregnancy restricted ewes fetus growth development

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Integrating MODFLOW and GIS technologies for assessing impacts of irrigation management and groundwater use in the Hetao Irrigation District,Yellow River basin

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Science China(Technological Sciences) 2009年第11期52卷 3257-3263页

作者： XU Xu1,2, HUANG GuanHua1,2 & QU ZhongYi3 1 Center for Agriculture Water Research, China agricultural university, Beijing 100083, China 2 Chinese-Israeli International Center for Research and Training in Agriculture, China agricultural university, Beijing 100083, China 3 Water Conservancy and Civil Engineering College, inner mongolia agricultural university, Hohhot 010018, China Center for Agriculture Water Research China Agricultural University Beijing China Chinese-Israeli International Center for Research and Training in Agriculture China Agricultural University Beijing China Water Conservancy and Civil Engineering College Inner Mongolia Agricultural University Hohhot China

Due to severe water scarcity, water resources used in agricultural sector have been reduced markedly in Hetao irrigation district. Application of water-saving practices (WSPs) is required for the sustainable agricultural development. The human activities including WSPs and increase of groundwater abstraction can lower down the groundwater table, which is helpful to the salinity control. Meanwhile, an excessively large groundwater table depth may result in negative impact on crop growth and fragile ecological environment. In this paper, the Jiefangzha irrigation system in Hetao irrigation district was selected as a typical area, a groundwater flow model based on ArcInfo Geographic Information System (GIS) was developed and implemented to quantify the effect of human activities on the groundwater system in this area. The preand post-processing of model data was performed efficiently by using the available GIS tools. The time-variant data in boundary conditions was further edited in Microsoft Excel with programs of Visual Basic for Application (VBA). The model was calibrated and validated with independent data sets. Application of the model indicated that it can well describe the effect of human activities on groundwater dynamics in Jiefangzha irrigation system.

关键词： groundwater flow modeling MODFLOW GIS water-saving practices irrigation district

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An improved SIFT Algorithm for Feature Points matching of dairy cow images

An improved SIFT Algorithm for Feature Points matching of da...

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亚洲精细农业与计算机农业应用联合大会

作者： Lizhong Wang Vocational and Technical College inner mongolia agricultural university Hohhot inner mongolia China Shuoshi Ma College of Mechanical and Electrical Engineering inner mongolia agricultural university Hohhot inner mongolia China Heru Xue Zhenjie Hou College of Computer and Information Engineering inner mongolia agricultural university Hohhot inner mongolia China

The conformation is the main parameter in dairy cow appraisal;hence, it is necessary for the measuring and evaluating of dairy conformation to use machine vision technology in 3D reconstruction. The feature points detecting and matching are the pivotal steps in 3D reconstruction. The conventional SIFT feature points matching algorithm has shortcomings of too large search area and low efficiency, An improved SIFT feature points matching algorithm is proposed to reduce the search range from both row and column directions based on binocular vision principle. 2.7 times of in speed by the improved algorithm has been shown in the experiments compared with that of the conventional algorithm with the same matching precision.

关键词： diary cow conformation feature points detecting feature points matching SIFT algorithm

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INITIAL RESEARCH INTO CLIMATIC CHANGES AND GRASSLAND DEGENERATION IN inner mongolia

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Natural Disaster Reduction in China 2003年第4期 26-31页

作者： Li Qingfeng\+1, Li Fusheng\+2 and Wu Lan\+2 (1. College of Ecology and Environment Science, inner mongolia agricultural university, Hohhot City 010019, inner mongolia, China 2. Xilin Gol Grassland Station of inner mongolia, Xilin Gol, 024000, inner mongolia)

Based on the variation tendency of grassland productivity, this article describes the present situation of the grassland degeneration in inner mongolia,. With its emphasis on two main meteorological factors (precipitation and air temperature), this article analyzes the characteristics of climatic changes in the inner mongolia prairie in 30 years (1970～1999) and discusses the effect of climatic factors on grassland degeneration. At the same time, this article analyzes the causes for the deterioration of grassland ecological environment from such aspects as the material flow balance within the grassland ecosystem and the effect of human activities on grassland ecosystem. The analysis shows: from the present meteorological data and grassland monitoring data, it is hard to conclude that the grassland climate is getting drier and drier and proceeds to cause the deterioration of the grassland ecosystem; animal husbandry is the main type of land use in this area, the vegetations within the ecosystem are mainly controlled by domestic animals, and the main causes for the rapid deterioration of grassland ecosystem are the malajustment of input and output of material flow (take N for example) and the seasonal imbalance of supply and demand between the grass and the domestic animals; while the climatic changes only make the deterioration of the ecosystem more serious. This article proposes that the effective measures to harness and maintain the grassland ecosystem health in this area are to increase the material input within the ecosystem, to adjust the nature production mode of grazing all through the four seasons, and to actively introduce new seeds into animal husbandry to alleviate the grazing pressure on the grassland during the sensitive spring period, etc..

关键词： inner mongolia prairie grassland ecosystem climatic changes grassland degeneration

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Effect of Supplementary Feeding on Growth Performance and Ruminal Fermentation in Winter Season Grazing Sheep

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畜牧与饲料科学 2010年第Z1期 423-425页

作者： H.L.Hu1,2,D.X.Lu2,Y.Z.Liu2(1.inner mongolia agricultural university,Hohhot,inner mongolia,P.R.China 010018 2.inner mongolia Academy of agricultural and Animal Sciences,Hohhot,inner mongolia,P.R.China 010031)

The experiment was conducted with twenty-four grazing sheep divided into 3 experimental groups on the basis of body weights,***,optimal and non-optimal groups to study the effect of optimized supplementation on growth performance and rumen fermentation characteristics of grazing sheep in *** sheep in control were grazing only,whereas the grazing sheep in the optimal were supplemented with 250 g of an optimal forage mix and 404 g of *** animals in non-optimal were supplemented with 465 g of concentrate *** gain rate in the optimal increased by 1.2% and 15.3 % as compared to that of the non-optimal and control group,*** fermentation parameters were not significantly different between the optimal and non-optimal groups,however,they were significantly improved compared to the *** results indicated that optimized supplementation strategies in winter were beneficial for markedly improving growth performance and rumen fermentation characteristics of grazing sheep.

关键词： sheep grazing supplementary feeding growth performance fermentation characteristics

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Evaluation of genetic diversity and relationships within and between two breeds of duck based on microsatellite markers

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Progress in Natural Science:Materials International 2009年第11期19卷 1581-1586页

作者： Fei Wu~a,Yinghua Huang~a,Ying Ma~b,Shengqiang Hu~c,Jinping Hao~c,Ning Li~a a State Key Laboratory for Agrobiotechnology,China agricultural university,Beijing 100193,China b College of Animal Science and Veterinary Science,inner mongolia agricultural university,Hohhot 010018,China c Gold Star Duck Production Ltd.,Beijing 100076,China State Key Laboratory for Agrobiotechnology China Agricultural University Beijing 100193 China College of Animal Science and Veterinary Science Inner Mongolia Agricultural University Hohhot 010018 China Gold Star Duck Production Ltd. Beijing 100076 China

The genetic diversity of two natural populations(M,N) of Beijing duck(Anas platyrhynchos) and 11 artificially selected lines of Beijing duck(A,B,E-L,O) from China Gold Star Duck Production Ltd.,along with two Cherry Valley duck lines(C and D) from the British Cherry Valley Livestock Division,was evaluated using 18 microsatellite markers covering 16 linkage groups.A phylogenetic tree of the 15 populations of duck,formed of four main branches,was constructed from Nei’s DAgenetic *** mean genetic differentiation index(FST) in all loci,Nei’s standard genetic distance(Ds),and the genetic distance DAbetween the Beijing duck and the Cherry Valley duck were 0.075,0.143 and 0.142,*** results demonstrated a high degree of genetic similarity between the two breeds and supported the hypothesis that the Cherry Valley duck was derived from the Beijing *** FSTmatrix of seven clusters of Beijing duck suggested that the efficiency of selection was not significant to some extent and should be supplemented by marker -assisted selection.

关键词： Duck Microsatellite marker Genetic diversity Genetic distance

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Effects of spring-resting （spring grazing banning） on grassland productivity and vegetation composition in typical grassland of inner mongolia,China

Effects of spring-resting （spring grazing banning） on gras...

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ⅩⅪ International Grassland Congress and the Ⅷ International Rangeland Congress

作者： LI Qingfeng College of Ecology and Environmental Science inner mongolia agricultural university Hohhot 010019

＜正＞Introduction Traditionally,grasslands in Northern China had been utilized in a way of"whole year around grazing of grasses on offer"in which animals had too heavily relay on the herbage available on the *** grazing pressure and excessive trampling during winter-spring season caused large areas of grassland *** regrowth was checked off by grazing

关键词： spring resting grazing banning grassland productivity plant composition

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Study on the Region scale Diversity of Rodent Community in Semi-Desert and Desert Areas of China

Study on the Region scale Diversity of Rodent Community in S...

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2009中国草原发展论坛

作者： A juan Wu Xiaodong~(**) Fu Heping (inner mongolia agricultural university,Hohhot 010018,China)

＜正＞Introduction Animal community,which is a functional unit and organizational structure,is always one of the cores in ecological *** deserts of the world present natural laboratories for the study of community structure and the processes influencing that *** because of the common biotic condition and relative structural（vegetative）simplicity of deserts,these systems have played a promi-

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主动作物冠层传感器GreenSeeker在马铃薯氮素营养诊断中应用的可行性分析

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中国蔬菜 2012年第4X期 20-25页

作者：于静李斐樊明寿内蒙古农业大学农学院内蒙古呼和浩特010019 内蒙古农业大学生态环境学院内蒙古呼和浩特010019

长期以来氮肥的施用在马铃薯生产中起到了重要作用。但是,随着氮肥施用量的增加,氮肥利用效率势必会降低并造成一定的环境问题。因此,根据马铃薯的需肥规律进行氮肥的施用,提高氮肥利用率已成为业界共识。然而,传统的氮肥推荐方法如土... 详细信息

长期以来氮肥的施用在马铃薯生产中起到了重要作用。但是,随着氮肥施用量的增加,氮肥利用效率势必会降低并造成一定的环境问题。因此,根据马铃薯的需肥规律进行氮肥的施用,提高氮肥利用率已成为业界共识。然而,传统的氮肥推荐方法如土壤测试的方法费时费力、实时性差。随着遥感测试技术的发展,一些传感器应运而生,使基于光谱的植株氮营养快速检测成为可能。本文介绍了主动作物冠层传感器GreenSeeker对作物营养诊断的原理及其在玉米、小麦等作物上应用的国内外研究进展,并讨论其在马铃薯氮素营养诊断和精确施肥的重要性、可行性及应用前景。

关键词：马铃薯氮素营养诊断 GreenSeeker NDVI 综述

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Studies on Rodent community in Region scale of Semidesert and Desert Region of inner mongolia

Studies on Rodent community in Region scale of Semidesert an...

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2009中国草原发展论坛

作者： A juan,Wu Xiaodong~(**),Fu Heping (inner mongolia agricultural university,Hohhot 010018,China)

The structure and distribution of rodent communities,were comprehensively studied by mainly using trap-day methods in semi-desert and desert region of inner mongolia from 1988 to 1993 and from 1998 to 2004..The region belongs to arid and super-arid region of inner mongolia(37°24′～44°59′N,97°10′～114°10′E) including northwest part of Xilingguole league,center-west part of Wu-lanchabu league,center-north part of Bayenaoer league and the total area of Alashan *** contained various types of grassland:temperature desert - grassland,grassland-desert and typical desert. The total of 317 sampling plots were arranged in an area of 380,000 km,and total of 157,702 trap-days were completed,The results showed:

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