不同栽培树形对油橄榄品种果实产量的效应

Longnan City in Gansu Province is the largest base of olive production in China. In the olive orchard locating in Wudu District of Longnan City, thirty trees were sampled each of three cultivars, ‘Leccino’, ‘Chenggu32’, ‘Ezhi8’, with monoconical and vase training system. After planted with density of 5×6 m in 1992, each sample tree was investigated to determine the yield fresh fruit in five different years. The results of survey and analysis showed that there were significant differences of fruit yield among 5 years and 3 cultivars. Different canopy shapes yielded some effect on fruit setting rate and yield of different cultivars in different years. During first fruiting period in the fourth/sixth year after planting, fruit setting rate and yield of ‘Leccino’ with monocone were more 6.7% and 0.15 kg than those with vase and those of ‘Ezhi8’ and ‘Chenggu32’ with vase were more 20%, 10% and 0.18 kg, 0.09 kg than those with monocone. With the increase of tree age, fruit set and yield of ‘Leccino’ and ‘Ezhi8’ with vase was more than those of monocone. In 2011, average yields per tree of ‘Leccino’ and ‘Ezhi8’ with vase were more 13.35 kg and 6.85 kg than those with monocone. And the highest yield per tree of ‘Leccino’ with vase was 75 kg, more 16 kg than that of monocone. Fruit trees with yield over 35 kg of ‘Leccino’ and 25 kg of ‘Ezhi8’ with vase accounted for 80% and 46.7%, more 40% and 30.01% than those of monocone. It was concluded that vase training system would produce higher yield of ‘Leccino’ and ‘Ezhi8’ and its effect and advantages were gradually prominent with increase age. As for ‘Chenggu32’, monocone got a slightly higher yield than that of vase and in 2011 fruit trees with yield over 15 kg accounted for 25%, more 8.34% than vase. The difference between two training system of this cultivar was not obvious.     

枯草芽孢杆菌对黄羽肉鸡生长性能及营养物质代谢率的影响

试验旨在研究枯草芽孢杆菌对黄羽肉鸡生长性能及营养物质代谢率的影响,为枯草芽孢杆菌制剂在黄羽肉鸡生产中的应用提供理论依据。选择60羽7周龄体重相近、健康的黄羽肉鸡,随机分成5组,每组设4个重复,每重复3羽,设一个对照组,饲喂基础日粮;试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组分别在基础日粮中添加0.05、0.1、0.15、0.2 g/kg的枯草芽孢杆菌制剂(活菌数为10⁸ CFU/g)。试验期30 d。结果表明,与对照组相比,试验Ⅱ、Ⅲ、Ⅳ组日增重分别提高了49.03%(P<0.05)、46.39%(P<0.05)和37.04%(P<0.05),各试验组饲料报酬均有所提高但无显著差异;各试验组可极显著提高粗蛋白质的代谢率(P<0.01),粗脂肪、钙、磷及表观代谢能的代谢率均有提高,试验Ⅲ组极显著提高黄羽肉鸡对钙、磷的吸收利用率(P<0.01),并且,试验Ⅲ组粗蛋白质、粗脂肪的代谢率最高。因此,在黄羽肉鸡日粮中枯草芽孢杆菌制剂适宜的添加量为0.15 g/kg。     

塔里木盆地罗布麻对鸡生理生化、免疫力及生产性能的影响

罗布麻是夹竹桃科野生草本植物,主要分布在塔里木盆地的塔里木河、孔雀河、开都河、阿克苏河、叶尔羌河和田河等沿岸.此次试验旨在研究罗布麻对鸡生理生化、免疫力和生产性能的影响.     

农机──武克敬局长与令狐忠勇厂长合力研制高茬播种施肥机纪事

1．为禁烧茬武局长赴田乐会令狐近年来，小麦机收面积迅猛扩大，联合收割机收过的田里往往铺满了高茬秸秆，农民们无法进行复播。为了尽快复播，往往点火焚烧麦秸，火到之处，浓烟滚滚，把秸秆中宝贵的有机质烧掉了，同时还污染了环境，由此而引发的火灾与纠纷频频发生，危害极大。这一问题引起了各级领导的重视，曾三令五申严禁焚烧麦茬。然而领导和群众都深知，解决这一问题的关键，在于适用的高茬复播新机具尽快问世。临倚县是山西省的农业大县，改革开放以来，这里的农机化发展迅猛，现已成为山西省的农机大县。临猗县农机局的武克敬局…     

饲料防霉剂的应用研究

山梨酸又称清凉茶酸，其盐类主要包括山梨酸钠、山梨酸钾和山梨酸钙。     

水稻稻曲病及纹枯病的发生与防治

一、水稻稻曲病 1、症状识别 稻曲病只发生于穗部,一般在水稻开花至乳熟期发病,主要在水稻抽穗至扬花期感病,危害穗上部分谷粒,少则每穗1～2粒,多则每穗10多粒.初发病的病粒大小、形状与健粒基本相同,病粒色泽稍带黄色,有充实感,不透光,剥开颖壳,可见白色絮状物.病菌孢子多在破口期进入,在颖壳内生长,初时受侵害谷粒颖壳稍张开,露出黄绿色的小型块状突起,后逐渐膨大,将颖壳包裹起来,形成比正常谷粒大3～4倍的菌块.菌块近球形,颜色逐渐变为黄绿或墨绿色,墨绿色菌块表面光滑,最后龟裂,散出墨绿色粉末(孢子).     

无污染防治病虫害技术在城市园林中的应用

用生物农药逐步替代化学农药是城市园林绿化的发展方向。从天坛公园无农药污染防治病虫害的几项重点工作中总结出的经验，对全国城市园林绿化具有广泛的应用前景，也会产生明显的社会、生态和经济效益。     

浙江慈溪县级市生态建设的问题与对策研究

应用生态分析的方法,以浙江慈溪县级市为例,分析了其在经济发展的同时所带来的生态环境问题,进而提出以规划管理为中心的对策,包括明确城镇体系,发展第三产业,建立工业区块,推进农业产业化和发展集约型居住区。     

农机农艺结合推动农业现代化进程

随着农业技术的不断进步和规模化生产要求的不断加强,农机在现代农业中的技术份额将会愈来愈大,农机与农艺的矛盾显得愈加突出,如果不能从根本上彻底解决,不仅会继续造成资源的浪费,而且还会由于无法实施先进的生产手段而直接制约现代     

天然林的明珠—自然保护区

现在，天然林保护工程已在全国启动，云南天然林保护工作任重道远。朱基总理在云南视察工作时，曾反复强调天然林保护工作的重大意义。他说，像云南这样还有大片森林的宝地，在全因已经不多了，要十分珍惜这样一块宝地。他要求“无论如何要把我们最后一块宝地给保住”。省长李嘉廷则要求各级林业部门，把天然林保护工作列为林业各项工作的重中重。中央及省领导的高度重视，是搞好云南天然林保护的重要保证2而切实加强自然保护区的保护，则又是大然林保护工作的重中之重。因为自然保护区是大然林这个宅地中的推保明珠。顾名思义，天然林就是…