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1.
草坪杂草化学防除研究初报   总被引:6,自引:0,他引:6  
于凤芝 《中国草地》1997,(1):49-52,66
防除草坪中双子叶杂草用72%的2,4-D丁酯0.75 ̄0.98kg/hm^2或72%的2甲4氯1.5kg/hm^2,株防效为86.2% ̄96.9%;防除草坪中单子叶杂草可根据草坪的建植年限及草坪草的高度选用12%的恶草灵3.6 ̄4.2kg/hm^2或12.5%的拿扑净0.9kg/hm^2,防效为86% ̄94.9%;同时防除单、双子叶杂草用恶草灵复配剂3.2 ̄4.0kg/hm^2或拿扑净复配剂1.7  相似文献   

2.
利用荒漠和盐碱地建立人工草地的效益分析   总被引:4,自引:1,他引:3  
1991~1992年,在海西州德令哈市利用荒漠建立半人工草地86.1hm^2,利用盐碱弃耕地建立人工草地74.6hm^2,取得了明显的生态、社会和经济效益,建植第三年的沙打旺人工草地植被盖度由原来的15%提高至70%~80%,耕层(0-30cm)总盐平均含量由原来的9.3g.kg^-1,下降1.23g.kg^-1,脱盐率达86.26%,在受益期内,160.7hm^2人工、半人工草地可新增牧草360  相似文献   

3.
采用“以青为主,主养草鱼,增放其它底层鱼,带养鲢、鳙鱼”综合技术措施,使示范塘0.73hm^2,经180d饲养总产鲜鱼7086.5kg,平均单产9751.5kg/hm^2,投入产出比达到1:2,节约精饲料7125kg/hm^2。此外,采用草鱼注射和浸泡免疫防病技术,使草鱼成活率由未免疫的50%提高到88%。  相似文献   

4.
秋播箭舌豌豆喷施“益微”增产菌的效果   总被引:1,自引:0,他引:1  
在复种箭舌豌豆上用225g/hm^2、300g/hm^2的剂量进行2次叶面喷施,其鲜草产量分别达28001.4kg/hm^2、29668.2kg/hm^2,比不喷施赠草量13.5%和20.3%。  相似文献   

5.
对6种青饲牧草用7种除草剂进行除草试验。证明播后苗前墨西哥类玉米用40%阿特拉津胶悬剂0.90kg(ai)/hm^2;M-81E饲用高粱与串叶松香草适宜用60%丁草胺乳油0.90kg(ai)/hm^2;苏丹草适宜用60%丁草胺乳油0.90kg9ai)/hm^2与25%绿麦隆可湿性粉剂0.94kg(ai)/hm^2,紫苏用12%恶草灵乳油0.27kg(ai)/hm^2与84%chinch乳油1.89  相似文献   

6.
四川凉山州光叶紫花苕良种德育及推广研究   总被引:2,自引:0,他引:2  
刘凌  何萍 《草业科学》1999,16(3):8-12
通过对凉山光叶紫花苕良种选育及应用研究,系统分析了该草种在不同生态条件下(海拔1500-3200m)的生物学和生态学特性,主要经济性状是,分枝期全草干物质 蛋白含量为30.69%,粗脂肪8.70%,粗纤维22.80%,无氮浸出物为28.03%,粗灰分8.72%,钙1.48%,磷0.23%,还含有17种必需氨基酸。平均鲜草产量45000-75000kg/hm^2种子产量600-1200kg/hm^2  相似文献   

7.
华南红壤山地牧草混播组合的研究   总被引:1,自引:0,他引:1  
选用适宜华南红壤山地栽培的7个主要牧草进行7个处理的混播组合,结果以卡松古鲁狗尾草+宽叶雀脾+马唐+鸡眼草组合为最好,在华南红壤山地位地条件较差,年施尿素112.5kg/hm^2和钙镁磷肥412.5kg/hm^2的情况下,人工草地建植当年干草产是一可达7968.0kg/hm^2,翌年为9073.5kg/hm^2。  相似文献   

8.
戎郁萍  苗春林 《中国草地》1998,(4):28-30,35
研究了不同放牧强度下(0.8nm^2/牛和1.2hm^2/牛)科尔沁肉牛的日增重和单位面积产量的差异,以及其对草地状况的影响,研究结果表明,不同放牧强度下肉牛的日增重无显著差异(分别是0.441kg和0.4482kg);高放牧强度的处理,单位面积的产量高(分别是0.5525kg/hm^2-d和0.3735kg/hm^2.d),但对草地持续生产不利,导致草群中禾草比例下降而杂草比例上升。  相似文献   

9.
退化人工草地更新效果观测   总被引:7,自引:2,他引:5  
耿文诚 《草业科学》1998,15(3):55-58,63
利用草地建植方法,对175.7hm^2退化人工草地进行了更新改良,结果,当年平均干草产量达3570kg/hm^2比未更新地带提高2058kg/hm^2;播种牧草相对重量65.9%,未更新地带15.1%,优势度由重建前的27.0%上升至61.8%,恶性杂草竞争力下降,基本形成白叶+黑麦草+鸭茅+画眉草+红三叶+狗尾草+白茅+蒿类的格局。  相似文献   

10.
半干旱风沙区人工牧草沙打旺需水规律的研究   总被引:8,自引:0,他引:8  
通过对沙打旺需水规律研究,探明了不同土壤湿度与牧草产量,生长速度的关系,分析了灌溉对沙打旺产量,生长速度的影响。结果表明沙打旺对水分盈亏十分敏感,是需水量较多的人工牧草,其产量及生长速祺与土壤湿度成正比例关系,当土壤湿度由57%变化到80%时,产量增长一倍,各生长阶段适湿度值在57%-87%之间变化,当于草产量达到600kg/hm^2时,需水量为5700m^3/hm^2。干旱风沙区人工牧草灌溉可以  相似文献   

11.
Forty dogs with clinical signs suggestive of upper respiratory tract disease underwent echolaryngography and laryngoscopy. Laryngoscopy was used as the definitive technique to diagnose laryngeal paralysis. The ultrasound investigation accurately indicated the presence of the paralysis and confirmed the uni- or bilateral nature of the disorder. Findings indicative of laryngeal paralysis included asymmetry or absence of motion of the cuneiform processes (30/30), abnormal arytenoid movement (16/30), paradoxical movement (9/30), caudal displacement of the larynx (2/30) and laryngeal collapse (1/30). Thirty dogs were found to be afflicted with laryngeal paralysis and ten had normal laryngeal motility.  相似文献   

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13.
This case report describes the radiographic/clinical progression of a lesion in the middiaphysis of the radius in a dog. The lesion initially looked benign but progressed and eventually was diagnosed as an anaplastic osteosarcoma.  相似文献   

14.
Electrocardiograms were reocrded from 153 racehorses and 10 Olympic three-day-event horses. The horses were then grouped into those presented for routine examination, those in which there was a complaint of poor performance, those going to the Montreal Olympics, and those with upper respiratory tract abnormalities. When the ECGs of the four groups were compared on the basis of detection of abnormality, it was found that 93.2% of the poor performance group showed abnormalities of various types. The routine examination group showed 21.1% of horses with abnormal ECGs, and over half of these have been followed to the point where it can be said they raced unsuccessfully. In particular, this applied to those horses with T wave abnormalities in 4 or more leads, and to those with intraatrial block. There were significant T wave changes in 50% of the Olympic horses, and 43.7% of horses with laryngeal hemiplegia showed abnormality. While it can be concluded that T wave changes are highly significant findings in an ECG, it is also true that modification of the training programme is a way of helping trainers to get the best out of horses which might otherwise have a serious limitation of their performance potential.  相似文献   

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宗教在社会生活中可以发挥重要影响。在构建社会主义和谐社会的系统工程中,我们应该用和谐思维正确认识宗教与和谐社会建设的关系,发挥宗教在社会生活中的积极作用,妥善处理宗教方面的矛盾,化解宗教的负面影响。  相似文献   

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The distributions of the following feral animals are given -- cattle, buffalo, pig, goat, deer, camel, horse, donkey, fox, dog and cat -- and the native dingo. The possible role these and the native rodents, marsupials and monotremes would play should an exotic disease of livestock enter Australia is discussed. It is considered that feral animals would be important in creating foci from which the disease would spread.  相似文献   

20.
检测15头奶牛离体外周血单核细胞和体内产生抗体免疫应答的结果表明,1.0μg/ml的PWM或SEB使PBMC增殖达最高值,但在分泌Ig中却表现出不同作用,还发现在群体内离体细胞增殖强度的变异程度小于分泌的Ig量的变异程度。  相似文献   

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