爱丰有机腐殖酸液肥在小麦上的试验效果研究

爱丰有机腐殖酸液肥是采用德国先进的酶促矿化剂为核心成分,配以腐殖酸、草碳、氮、磷、钾、钙、镁、硫及铜、锰、硼、钼等多种微量元素精制而成的一种无毒、无污染的高活性绿色有机液体肥料。它可以提高作物产量,改善农作物品质,增强抗逆能力。为进一步了解爱丰有机肥对小麦生长发育的影响,我们在不同时期对小麦进行叶面喷施,研究其在小麦上的应用效果和合理使用方法,更好地发挥其在生产中的作用。     

油柑真菌病害的鉴定

报道了发现于广东的油柑真菌病害４种，即叶点霉引起的褐斑病，球梗孢，引起的拟炭疽病，拟盘多毛孢引起的叶斑病以及白粉病，前两种病的病原菌为新种，第３种病为国内新病害。新种的模式标本存放于华南农业大学真菌标本室内。     

三种处理的玉米秸型优化日粮肥育肉牛效果的研究

将15头草原红牛平均分成3组,1、2、3组依次饲喂青黄贮玉米秸型日粮、玉米秸饲料块型日粮和玉米酒糟型日粮,进行268d的饲养试验,然后屠宰。1、2、3组试验牛的日增重依次为1022g、1140g和1186g;屠宰率依次是57.44%、58.73%和58.31%;净肉率依次是48.35%、50.06%和49.45%。各种饲料和活牛价格按时价计算,经济效益最好的日粮是玉米酒糟型,其次是玉米秸饲料块型,青黄贮玉米秸型效益较差。     

沸石改土保肥及增产效果的研究

以天然沸石为试验材料，通过３ａ多的田间小区和示范研究表明，在中，低等肥力的草甸褐土，盐化潮土中施入石后，能改善土壤的理化性状，降低土壤盐分浓度，提高肥效，一次施入连续３ａ多茬作物都获得了明显的增产效果。     

我国兽药产品网络销售现状及管理对策

随着电商营销的发展,兽药销售的网络平台陆续涌现,如何建立兽药网络销售准入标准、审批程序及监管措施已成为监管部门和相关企业亟需解决的课题。本文梳理了我国兽药产品网络销售现状,借鉴人用药品网络销售管理经验,建议在国家出台《中华人民共和国电子商务法》的基础上,结合《兽药管理条例》修订,完善我国兽药网络销售相关配套法规,明确第三方平台的责任义务,构建全国兽药经营企业数据库管理系统,推进兽药二维码追溯体系建设,对兽药网络营销企业分类管理和准入管理等措施,以期为提升我国兽药网络销售监管水平提供信息支持。     

浙江省小城镇生态环境问题及规划对策——宁波市古林镇为例

快速的城市化给小城镇的原始生态环境安全带来了严重的威胁。造成这种情况有各方面的原因。以宁波市鄞州区古林镇为例,在解析造成环境压力的原因后,从生态环境规划的角度提出细胞组织模型的规划对策,旨在保护浙江省小城镇规划时的生态环境安全。     

Ochratoxin A: Carryover from animal feed into livestock and the mitigation strategies

This review aims to highlight the effects of ochratoxin A (OTA) in the feed of meat-producing animals. The accumulation of OTA in feed and its distribution in various farm animals were compared and evaluated. Primarily, the oral administration of OTA-contaminated feed and the predisposition in an animal''s vital organ were critically examined in this work. The collated reports show that OTA directly associated with endemic nephropathy and its high concentration leads to degeneration of liver cells, and necrosis of intestinal and lymphoid tissues. At present, limited reports are available in the recent literature on the problems and consequences of OTA in feed. Therefore, this review focused on the OTA carryover from feed to farm animals and the interaction of its secondary metabolites on their biochemical parameters. Hence, this report provides greater insights into animal health related to OTA residues in meat and meat products. This article also explores mitigation strategies that can be used to prevent the carryover effects of OTA in livestock feeds and the effects in the food chain.     

Multi‐Scale Anthropogenic Driving Forces of Karst Rocky Desertification in Southwest China

Karst rocky desertification (KRD) is a type of land degradation especially prominent in southwest China. This article analyzes the anthropogenic driving forces of KRD at two scales: rural locality and its macro socio‐economic circumstances. At the rural locality scale, the intensive human pressure on land because of a large and fast growing population and unsustainable land use are identified to be the reason for KRD. However, more radical driving forces lie in the farmers' disadvantages in social‐economic circumstances, which compel them to overuse rural land. Hukou system, coastal development strategy, and household responsibility system are verified as three important factors in social‐economic circumstances. At last, a two‐scale framework is constructed to explain how anthropogenic driving forces lead to KRD in southwest China. Copyright © 2013 John Wiley & Sons, Ltd.     

地膜覆盖灌水技术在北方地区的应用

地膜覆盖可有效改善作物根部生态环境、减少地面糙率和地面蒸发。根据我国不同地区降雨、蒸发和作物种植等条件，提出长城风沙线以北高蒸发、少雨区，较为适宜的灌水方法有膜下滴灌技术、平膜覆盖膜孔灌水技术等；长城风沙线以南小麦适生区为中等降雨和蒸发强度地区，条播作物适宜的地膜灌水方法有垄膜覆盖膜缝灌水和膜孔灌水、平膜覆盖膜孔灌水等。     

膜上灌作物需水量和地膜覆盖效应试验研究

1998年和 1 999年在新疆自治区乌兰乌苏农业气象实验站内进行了膜上灌条件下的覆膜棉花和玉米的需水规律及地膜覆盖效应的试验研究。结果表明地膜覆盖具有明显的增温保墒效应 ,在苗期增温效应尤为显著 ,覆膜农田地表下 5 cm、1 0 cm、1 5 cm、2 0 cm和 2 5 cm在 8:0 0、1 4:0 0和 2 0 :0 0等 3个时刻 ,苗期平均地温比露地棉田分别高 5 .7℃、3 .3℃、3 .5℃、1 .5℃和 1 .2℃。同一灌水下限条件下 ,在整个生育期内覆膜棉花、玉米耗水较未覆膜棉花、玉米分别减少水分蒸发损失 73 .6mm和 60 .1 mm。在当地气候条件、土壤质地和作物栽培方式下覆膜棉花、玉米在全生育期内分别耗水 3 74.5 mm和 3 74.81 mm,平均耗水强度为 2 .2 6mm/d和 2 .97mm/d。