【摘 要】
：
集约化畜牧业同日臻完善的饲料生产及量丰质优的饲料调制的紧密结合,特别是在大量施肥后,种植高产多年生禾本科牧草——杂种苇状羊茅和苇状羊茅,它们能利用高氮肥并生产出大
论文部分内容阅读
集约化畜牧业同日臻完善的饲料生产及量丰质优的饲料调制的紧密结合,特别是在大量施肥后,种植高产多年生禾本科牧草——杂种苇状羊茅和苇状羊茅,它们能利用高氮肥并生产出大量营养物质。在莫斯科省苏联“60周年”国营农场,于1981～1983年间在施用高额有机肥料和化肥条件下对苇状羊茅和杂种苇状羊茅的产量
Tight livestock husbandry with the combination of improved feed production and high quality, high-quality feed modulation, especially after extensive application of fertilizers, to grow high-yielding perennial grasses - hybrid tall fescue and tall fescue - Use high nitrogen fertilizer and produce large amounts of nutrients. In the Soviet Union on the 60th anniversary of the state-run farms in Moscow Province, the yield of tall fescue and hybrid tall fescue under high organic fertilizer and fertilizer application from 1981 to 1983
其他文献
2010年6月21日,中国工程机械工业协会工程起重机分会第四届会员大会在徐州隆重召开,本次会议由徐工集团徐州重型机械有限公司承办。中国工程机械工业协会祁俊会长、徐工集团
We study the fringe visibility and the which-path information (WPI) of a general Mach Zehnder interferometer with an asymmetric beam splitter (BS).A minimum err
We report on magnetoresistance,Hall effect,and quantum Shubnikov-de Haas oscillation (SdH) experiments in NbIrTe4 single crystals,which was recently predicted t
6月24日,中国无锡,明亮洁净的生产车间内搭建的庆典仪式礼台上,Perkins全球总裁韩瑰恩(Gwenne Henricks)女士宣布无锡工厂第二条发动机生产线正式启动。该生产线致力于生产11
在水稻抽穗期,传统的叶片增氮措施是土壤施氮,但由于水稻后期根系逐渐衰老、活力下降,加上土壤吸附和流水掠走,这种方法效果差、收益低。为了推广叶面喷施尿素技术、找出喷
An extreme ultra-violet (EUV) wave is characterized as a bright pulse that has emanated from the solar eruption source and can propagate globally in the solar c
We show that the breakdown of dipole approximation can be adopted to explain the asymmetry structure in the photoelectron momentum distributions along the beam
近年来全国各地开展的轰轰烈烈的旧城改造工程,使得拆除机械日益走人人们视野.相较于传统人工拆除以及爆破拆除,利用机械进行拆除具有安全、高效、环保等优势,但长期以来拆除
高校校史文化作为一种特殊文化类型,是在特定的历史条件和环境下,经过长期积淀所形成的一种独特的思维与行为方式.校史文化在传承与创新过程中表现出鲜明的时代印记、丰富的
We use femtosecond time-resolved optical reflectivity to study the photoexcited quasiparticle (QP) dynamics in the iron-based 112 type superconducting (SC) samp