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针对现有玉米秸秆还田机数字化设计中普遍采用刚性建模,无法有效体现传动系统动力学特征的问题,采用刚-柔混合建模原理对改进型中收1JHY-200C型玉米秸秆还田机进行虚拟样机创制,采用SolidWorks和ADAMS创制整机刚体和柔体虚拟样机模型;通过添加运动约束实现了刚-柔混合虚拟样机集成.设计加载程序对玉米秸秆还田机开... 相似文献
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玉米施磷肥的生物效应 总被引:12,自引:2,他引:10
On the base of low phosphorus soil,studying biological effect of phosphorus fertilizer application,the results showed phosphorus application behaved significant biological effects at the whole growing stage.Phosphorus application compared with no-phosphorus treatment,root dry weight increased 26.5%-188.2% at seeding stage,max-leaf area index increased 0.25-0.58,LAD and photosynthesis productivity improved significantly,grain filling accelerated,1 000-grain weight and yield increased remarkably. 相似文献
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(一)培乔兴趣兴趣是成功的基础.如果对一个项目不感兴趣,没有热情,就很难长时间地去经营它.肉鸽养殖没有暴利,需要坚持不懈、长期经营.规模小时,还要亲力亲为.如果怕脏怕累,那就不要上马进行肉鸽养殖. 相似文献
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