共查询到20条相似文献,搜索用时 78 毫秒
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系统地研究设计了烟草起垄施肥机,提出了烟草起垄施肥机的总体方案。分析了排肥机机构,提出了排肥机的结构设计方案。确定了设计烟草起垄施肥机关键的技术参数,设计了烟草起垄施肥机的主要部件,提出了具体实施方法。 相似文献
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提高种子企业市场竞争力要抓好的八个方面 总被引:1,自引:0,他引:1
自从《中华人民共和国种子法》(以下简称《种子法》)颁布以来,基本打破了计划经济条件下地方保护供种的体制,推行了跨地区优胜劣汰的市场经济竞争新体制。通过竞争,使种子企业服务态度好了、品种优了、质量高了,让广大农民提早应用了新品种和优良品种,有效地促进了农业增产增收。而且也发展了种子企业,搞活了种业。但搞活了种业以后如何进一步提高企业竞争力? 相似文献
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<正>近年来,山丹县种子管理局以科学发展观为指导,切实加强了自身建设,强化了单位内部管理,加快了新品种的引进、试验示范和推广步伐,建立了标准化种子基地,加强了种子市场管理,加大了项目建设力度,有效地推动了种子产业化的发展,为农业增效、农民增收发挥了积极的作用。 相似文献
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本试验采用井水进行屋面喷水,有效地降低了屋面的温度,从而降低了仓内温度。减缓了粮温的上升速度,达到了分月控温标准,延缓了粮食陈化,增加了经济效益。 相似文献
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我国棉种产业化现状与前景展望 总被引:9,自引:0,他引:9
回顾了我国棉种产业的发展阶段,分析了棉种产业化实施的历史背景,从总体上和产业体系的五个方面分别归纳总结了我国棉种产业化取得的巨大成就,指出了我国棉种产业化存在的问题,提出了加快棉种产业化的政策建议,展望了我国棉种产业化的发展前景. 相似文献
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文章研究了HACCP在巴氏杀菌乳中的应用,描述了巴氏杀菌乳的工艺流程,并进行了危害分析,确定了巴氏杀菌乳生产的关键控制点,制定了相应的预防措施、控制方法、纠正措施,提出了标准操作规程。 相似文献
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《分子植物育种》2015,(3)
为了研究抗逆HS转录因子基因的功能,本研究采用叶片离体盐胁迫的处理方法,比较了转基因苜蓿突变体chs1、chs2植株的生理生化变化。结果显示:在盐胁迫下,与对照相比,野生型苜蓿可溶性糖含量增加了2.68%,转基因chs1突变体增加了6.37%,chs2增加了12.36%;野生型苜蓿脯氨酸含量增加了27.91%,chs1突变体增加了37.17%,chs2增加了53.30%;野生型苜蓿丙二醛含量增加了12.58%,chs1突变体增加了7.31%,chs2增加了6.49%;野生型苜蓿细胞质膜透性增加了185.96%,chs1突变体增加了124.76%,chs2增加了119.61%;野生型苜蓿SOD活性降低了4.05%,chs1降低了2.75%,chs2降低3.27%;野生型苜蓿POD活性降低了16.62%,chs1降低了3.54%,chs2降低了16.43%。综合分析认为,转基因chs突变体的耐盐性强于野生型植株。因此,HS转录因子基因可以用于其它作物的耐盐育种。 相似文献
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本文通过对几种测定玉米水分方法的比较,将微波干燥测水技术用于单个或小批量玉米水分测定中,所得测定结果符合国标要求。 相似文献
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Generally,a second order spring-damper system is used to represent the model ofweighing sensor in checkweigher. It only represents one part of checkweigher.In this paper,accord-ing to the relationships of individual parts of checkweigher and main disturbance source,a model isproposed for whole checkweigher.It is proved by simulatlon that this model is in a good approxima-tion. 相似文献
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The minimum sizes of specimens that can get effective K_(10) values by 3-point bending, 4-point bending and CT methods are derived on the basis of their notch sensitivity laws and size effect equation of concrete. The results show that the minimum heights of 3-point bending and 4-point bending specimens are very similar to those from Modeer's results, and the minimum height of CT specimen increases as the relative crack length increases. 相似文献
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用异丙醇代替乙醚—乙醇混合溶剂测定植物油脂酸价的研究 总被引:3,自引:0,他引:3
用3种不同溶剂测定植物油脂的酸价,发现用异丙醇作溶剂所测结果与GB5530-85所规定的溶剂测得值非常接近。而异丙醇具有无毒性、安全性高等优点。建议用来取代乙醚—乙醇混合溶剂测定油脂酸价。 相似文献
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This paper presents the general expressions of computer which include(1) calculation of the coefficient of normal equations;(2) calculation of the reduced coefficient;(3) calculation of[PVV];(4) calculation of the cor-relate;(5) calculation of the weight reciprocal(1/P_F)of the function of adju-sted value.Each calculation contains corresponding program of calculation.As a program block,it may be quoted at any time in the course of surveying computation. 相似文献
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Xian Wu Dong Dawei Luo Dali 《保鲜与加工》1989,(1):45-50
The instantaneous center of the cross-spring pivot is studied in this paper. It is also pointed out in this paper that three different kinds of center(the static geometric center the moving geometric center and the instan-tanaous canter), exist when the cross-spring pivot is deflected. Their relationship is calculated, the variation character of the moving geometric center almost condcides with the curve of S.Hildebrand's experiments. 相似文献
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Qiou Xiande Zhuang Qiancheng Wu Gang Xiao Changfu 《保鲜与加工》1992,(3):134-140
The problems that the bump of coal and methame in the mine is contraled by the
stress of longwall and that the coal and methane bump in the mine is affected by the physical properties of the coal are analysed and discussed through some specific bump cases. It is shown that the compressive stress, the content of the methane of the coal, and the bump of coal and methane are directly affected by the content of the ash and the volatile of the coal. 相似文献