反季节畜牧业发展刍议

分析了发展反季节畜牧业的意义,提出构建反季节草食畜牧业的主要措施是改变家畜出栏时间、暖棚育肥、实施屯草养畜及发展订单畜牧业。     

丰林自然保护区旅游解说系统问题分析及对策

旅游解说系统是自然保护区发展生态旅游的重要环节。本研究以丰林自然保护区为例,通过实地调查,并根据相关游客特征分析,指出丰林自然保护区旅游解说系统存在的问题,并提出改进对策。     

Construction of SSR Linkage Map and Analysis of QTLs for Rolled Leaf in Japonica Rice

Genetic analysis of rolled leaf is important to rice ideotype breeding. To detect loci controlling rolled leaf of japonica restorer lines, SSR marker genotypes and phenotypes of flag leaf rolling index (LRI) were investigated in Xiushui 79 (P1, a japonica rice variety), C Bao (P2, a japonica restorer line) and 254 recombinant inbred lines derived from the cross between P1 and P2 , and in two environments. A genetic map of this cross was constructed, QTLs for LRI were detected and their interactions with environments were analyzed. Among 818 pairs of SSR primers, 90 primers showed polymorphism between P1 and P2, and 12 markers showed highly significant correlation with LRI in both environments based on single marker regression analysis. The genetic map containing 74 information loci has a total distance of 744.6 cM, with an average of 10.1 cM between two adjacent loci. Three QTLs (qRL-1, qRL-7 and qRL-8-1) were detected with two softwares: WinQTLCart 2.5 and QTLNetwork2.0. qRL-8-1 was a new locus, accounting for 15.5% and 12.8% of phenotypic variations in the two environments, respectively. The phenotypic variation explained by additive effect was 6.6%. No interaction was found between qRL-8-1 genotype and environments.     

Anti-Inflammatory Activity of Chitooligosaccharides in Vivo

All the reports to date on the anti-inflammatory activity of chitooligosaccharides (COS) are mostly based on in vitro methods. In this work, the anti-inflammatory activity of two COS mixtures is characterized in vivo (using balb/c mice), following the carrageenan-induced paw edema method. This is a widely accepted animal model of acute inflammation to evaluate the anti-inflammatory effect of drugs. Our data suggest that COS possess anti-inflammatory activity, which is dependent on dose and, at higher doses, also on the molecular weight. A single dose of 500 mg/kg b.w. weight may be suitable to treat acute inflammation cases; however, further studies are needed to ascertain the effect upon longer inflammation periods as well as studies upon the bioavailability of these compounds.     

现场采购的利弊分析及解决对策探讨

从现场采购与其他采购方式的比较出发,对现场采购的优势、弊端进行深入的分析,提出做好现场采购工作的一些对策。     

图书馆标识系统探讨

提出了＂图书馆标识系统＂概念,对其现状、作用、设计原则和构成进行了探讨,并对图书馆标识系统的设计和改进提出了几点建议。     

内蒙古黄河流域水土保持工程水文频率设计模型研究

内蒙古黄河流域水土保持工程水文设计模型把水土保持工程设计中水文计算复杂繁琐的过程变的十分简捷。通过研究绘制水土保持工程所需不同频率24h降雨等值线图,将直接应用于水土保持工程设计中,使工程设计水文计算简便、准确、缩短设计时间,提高设计水平和效率。     

经济、技术、生态：现代农业的三大支柱

In the beginning of the 21st century thedevelopment of the agricultural sector in most of themodem industrialized countries continues to followthe main directions that have already been laiddown, but in doing so it is influenced and challengedat the same time by a number of factors in a wideropment, besides the ongoing integration in society,are the agricultural sector's strive for an equal de-velopment in economic and social terms and the im-pact of the ongoing technological development. Itwill be affected by an accelerating globalisation andliberalisation of agricultural production and trade.This seems to give the big multinational chains afree hand for a unilateral optimization of economicprogress, facilitated by technological progress andrapidly transferable knowledge. The increasinghowever, leads to a balanced strategy, in which notonly economy (profit) but also ecology (planet) andthe norms and values of technology and societyto be a generally new three dimensional frameworkfor further development in all branches' of industry,including agriculture. It will have big consequencesfor operating and that goes for the Dutch agricultur-al sector too. This new framework which can beused as a tool for guidance in organizing and devel-oping agricultural science and technology, is elabo-rated in this contribution.     

Relationship of phenotypic structures and allelochemical compounds of okra (Abelmoschus spp.) to resistance against Aphis gossypii Glover

The cotton aphid (Aphis gossypii) is one of the major pests of okra. Eleven okra varieties collected from farmers' fields in Cameroon and four aphid-resistant accessions from The World Vegetable Center (AVRDC, Asian Vegetable Research and Development Center) were evaluated from October 2012 to March 2013, and another seven aphid-resistant accessions from AVRDC were evaluated from March to July 2013 at AVRDC's Nkolbisson station, Yaoundé, Cameroon. Accessions selected from these trials were screened in an advanced confirmatory screening in autumn (October–December) 2013 in Shanhua, Taiwan. Results showed that none of the farmers' landraces were resistant to aphids. Two accessions (VI041210 and VI033824) with the lowest aphid populations had the highest trichome density. Analysis of various phytochemicals in selected okra accessions revealed that higher nitrogen and potassium levels made the okra accessions susceptible to aphids during the reproductive stage of the plants. Similarly, the total phenol content was lower in moderately resistant accessions during their reproductive stage. Aphid feeding induced an increase in phenols, and to a lesser extent, tannins. Accessions VI041210 and VI033824 could be incorporated into an integrated pest management strategy to enhance productivity of okra.     

浅谈芸豆田病害的防除

本文针对生产实际介绍几种芸豆田常见病害的防治措施。主要包括:锈病、根腐病、细菌性疫病、炭疽病等。