吕梁地区暴雨规律分析

吕梁地区位于黄土高原东部、属暖温带大陆性季风气候，降水量小，但多集中于汛期以暴雨形式出现。据该区120个雨量站和9个水文站1961年－2000年实测资料的统计分析，暴雨时空分布规律为：40年共发生场次暴雨126次，其中大暴雨61次，特大暴雨9次；暴雨大部分发生在局部小范围内，笼罩全区范围的仅20次；场次暴雨、大暴雨多发生于7月、8月份，分别占全年暴雨次数的75．4％和80．3％；场次暴雨在年际间存在着明显的递减趋势。     

晋西王家沟流域梯田系统产流分析

梯田周边的道路、坡耕地、疏林地、荒坡及梯田地埂、梯田田面6种地类统称为梯田系统。根据观测资料分析，在天然降雨年内分配不均的情况下，道路、坡耕地、疏林地和梯田田面等有较好的集流条件和较大的地面径流量。这些水资源若能采用先进的节水微灌技术进行合理利用，对缓解当地旱情，提高农业产量将起到重要的作用。     

Isoflavone,glyphosate, and aminomethylphosphonic acid levels in seeds of glyphosate-treated,glyphosate-resistant soybean

The estrogenic isoflavones of soybeans and their glycosides are products of the shikimate pathway, the target pathway of glyphosate. This study tested the hypothesis that nonphytotoxic levels of glyphosate and other herbicides known to affect phenolic compound biosynthesis might influence levels of these nutraceutical compounds in glyphosate-resistant soybeans. The effects of glyphosate and other herbicides were determined on estrogenic isoflavones and shikimate in glyphosate-resistant soybeans from identical experiments conducted on different cultivars in Mississippi and Missouri. Four commonly used herbicide treatments were compared to a hand-weeded control. The herbicide treatments were (1) glyphosate at 1260 g/ha at 3 weeks after planting (WAP), followed by glyphosate at 840 g/ha at 6 WAP; (2) sulfentrazone at 168 g/ha plus chlorimuron at 34 g/ha applied preemergence (PRE), followed by glyphosate at 1260 g/ha at 6 WAP; (3) sulfentrazone at 168 g/ha plus chlorimuron at 34 g/ha applied PRE, followed by glyphosate at 1260 g/ha at full bloom; and (4) sulfentrazone at 168 g/ha plus chlorimuron at 34 g/ha applied PRE, followed by acifluorfen at 280 g/ha plus bentazon at 560 g/ha plus clethodim at 140 g/ha at 6 WAP. Soybeans were harvested at maturity, and seeds were analyzed for daidzein, daidzin, genistein, genistin, glycitin, glycitein, shikimate, glyphosate, and the glyphosate degradation product, aminomethylphosphonic acid (AMPA). There were no remarkable effects of any treatment on the contents of any of the biosynthetic compounds in soybean seed from either test site, indicating that early and later season applications of glyphosate have no effects on phytoestrogen levels in glyphosate-resistant soybeans. Glyphosate and AMPA residues were higher in seeds from treatment 3 than from the other two treatments in which glyphosate was used earlier. Intermediate levels were found in treatments 1 and 2. Low levels of glyphosate and AMPA were found in treatment 4 and a hand-weeded control, apparently due to herbicide drift.     

XG-info电力地理信息系统在县级用电管理工作中的应用

计算机在电力部门的应用已经非常广泛,但是以往的计算机系统管理比较单一,加之部门业务的独立性所形成的信息档案的独立性,造成各管理部门之间的工作和信息资料共享都有很大的难度。山西省平遥县电业局引入XG—info电力地理信息系统以后,能够使这一局面得到改善。     

良好环境和分次喂料对母鸡早期生长和产蛋的作用

雏鸡阶段饲养的好坏，对母鸡的产蛋成绩有很大影响。法国依莎公司负责技术服务的工程师Ｅ．Ｐａｓｉｎ强调了两点：①良好的起步，提高早期增重；②增强饲养期内的食欲，提高采食量。不难发现，母鸡在１８周龄时的体重很不一致。Ｅ．Ｐａｓｓｉｎ指出，对依莎褐蛋鸡来说，...     

南美白对虾健康高效养殖技术

为了深入探索南美白对虾健康高效养殖模式,提高养殖经济效益,我们在引进广东等地区高位池对虾高产养殖模式的基础上,在温岭市绿珍水产养殖场进行了南美白对虾健康高效养殖试验,取得了良好的经济效益、社会效益和生态效益,平均亩产939kg,亩净利润9017元。一、池塘条件1.池塘池塘9口,单口池塘面积4亩~5亩,面积总计43亩。上半年在原土池基础上进行改造,改建后养殖池塘堤坝高3.0m~3.2m,蓄水深2.5m,池中央设排污口,四周安装1m×3m的网闸各2道,池底铺设管径20cm的PVC管各2根,用于排污。池塘四周堤坝用水泥混凝土护坡,池底用水泥混凝土浇灌或用黄…     

一起鸡食盐中毒的诊治

2006年5月．我团一养殖户家散养的400多只土鸡突然出现死亡死亡前，鸡精神异常必备．共济失调，痉挛抽搐，呼吸困难，大批鸡饮欲增加。死亡鸡以肝脏、肾脏肿大，腺胃粘膜充血，肠炎为主要病变，嗉囊积液，短时出现死亡，死亡率为24.3％。经病史、临床检查及病理变化及嗉囊内容物实验室检查，诊断为鸡食盐中毒。     

一起鸡食盐中毒的诊治

1发病情况及症状2006年5月,我团一养殖户家散养的400多只土鸡突然出现死亡。死亡前,鸡精神异常兴奋,共济失调,痉挛抽搐,呼吸困难,大批鸡饮欲增加。死亡鸡以肝脏、肾脏肿大,腺胃粘膜充血,肠炎为主要病变,嗉囊积液,短时出现死亡,死亡率为24.3%。经病史、临床检查及病理变化及嗉囊内容物实验室检查,诊断为鸡食盐中毒。2临床症状病鸡精神兴奋,饮欲增加,食欲不佳,倒提时口角流出粘液,嗉囊软肿。共济失调,张口呼吸,有的鸡精神沉郁,拱背缩颈,垂头闭眼、呆立,粪便稀软,有的水样腹泻,死前两翅急速挥动,阵发性痉挛,最后衰竭而死。3剖解变化病死鸡嗉囔…     

B超给奶牛养殖业带来的经济效益

要提高奶牛生产的经济效益，除了要饲养优良种畜外，也必须提高奶牛的繁殖率，最好做到一年一胎，而且年年可获较高的奶产量，就可以获得最好经济效益。要做到一年一胎，必须要在奶牛产后85天内配上种，这一时期称为空怀期（奶牛怀孕期280天左右），因此奶牛的空怀期越长，造成的经济损失就越大。怎样能缩短空怀期？