排序方式: 共有16条查询结果,搜索用时 15 毫秒
1.
甜玉米‘闽甜208’的生育特性与群体结构分析 总被引:1,自引:0,他引:1
多年生育特性观测表明,‘闽甜208’甜玉米春播采青生育期86-90d,秋播采青生育期73-76d,生育动态呈现苗期弱,中间旺长稳定期短,后期早衰快的生育特性,栽培上要注重精细播种,各项田间管理要及时到位。群体结构试验表明,‘闽甜208’叶面积系数(LAI)及叶片净同率(NAR)较高,峰值持续时间较长,大喇叭口至抽雄期LAI对NAR影响最大,通过密植保证一定的总粒数,增加抽雄后群体叶面积及干物质积累,提高成粒率,是高产的关键措施,适宜种植密度为4.95万-5.40万株·hm-2。 相似文献
2.
3.
4.
The objective of the present work is characterizing some parameters in the lay phase in the lines of heavy broilers breeder Cobb Avian 48, Arbor Acres Plus and Ross 208, reared under the same commercial conditions in the tropics. Monitored three batches of approximately 18,000 females each (one for each genetic type), from weeks 24 to 64, according to the conditions of handling and power described by the generic lines distribution companies. Although no differences were found for feed intake, Cobb Avian was presented a lower rate of feed conversion, being also that presented the highest percentage of implementation and production of incubables eggs, which meant that it was in line with the highest cumulative production of chickens by bird and week for tropical conditions studied. To adjust the lay data to a Gorssman model, in order to predict the parameters that characterize the lay modeling, estimated the best behavior for Cobb Avian 48 females, because while it takes more time to reach the level of putting constant (5.30 weeks) and maintain it for less time (2.4 weeks), they manage to put constant high (79.11%) level, considering that the largest number of eggs per bird (171.19 vs. 164.54 and 160.11 in Arbor Acres and Ross 208, respectively). 相似文献
5.
6.
超甜玉米“闽甜208”适宜播种期及施肥量研究 总被引:3,自引:0,他引:3
闽甜208适宜播种期及需肥量试验结果表明:该品种适宜播种期为3月下旬至4月上旬和7月下旬至8月中旬之间,且春播鲜穗产量高于秋播;最适施肥量为尿素390 kg/hm2、普钙937.5 kg/hm2、氯化钾375 kg/hm2,其产量最高,达14514.0 kg/hm2。。 相似文献
7.
西甜208是利用优良甜瓜自交系RB221为母本,YJ609为父本配制的一代杂交种,属于中果型厚皮甜瓜早熟种,全生育期95d左右,从开花到果实成熟28d左右。果实圆球形,充分成熟后果面浅黄色光亮,不落蒂;果肉白色,肉厚3.5cm左右,中心可溶性固形物含量16%-18%,单瓜质量0.8-2.0kg,667m2产量4000-5000kg。植株长势旺,抗病性强,不易早衰,适应性广,果实耐贮运性好,货架期长,室温下可贮藏15d以上。 相似文献
8.
9.
10.
提出一种基于Verilog HDL语言描述,FPGA实现的智能温室测控系统的软硬件设计方法。FPGA主控芯片采用Altera公司的EP2C8Q208C8芯片,结合ADC0809芯片完成数据采集,并在LCD图形液晶上显示采集到的信息,上位机界面采用VC++进行编程实现,上位机界面显示温室环境信息的实时值及其变化曲线。在温室控制方面,使用分段式控制,并且借助于串口继电器的无线模块实现无线控制。此种基于硬件电路的设计方法时钟频率高,响应及时,能够完成对温室内温湿度的采集、显示,以及对温室的控制。 相似文献