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, 2015 为研究施氮对人工羊草草地产量及养分吸收的影响.以中科2号羊草(Leyrnus chinensis‘ghongke No.2')为材料,设置5个氮肥处理水平,测定不同生育期羊草氮、磷、钾养分含量以及干草产量。结果表明:施用氮肥可以显著提高羊草产量,施用量以133.8 kg·hm~(-2)最为适宜,羊草产量为13134.7 kg·hm~(-2),每千克纯氮增产55.5 kg;施用氮肥可以提高羊草氮、磷 ...
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Motorization, Vehicle Purchase and Use Behavior in China: A Shanghai Surveyä¸åœ‹ä¹‹æ©Ÿå‹•åŒ–æš¨äº¤é€šå·¥å…·è³¼è²·å Šä½¿ç”¨è¡Œç‚ºï¼šä¸Šæµ·èª¿ç ”å Šæ¡ˆä¾‹åˆ†æž [PDF]
, 2008 Motorization is the transition from non-motorized travel means (e.g., walk) to motorized travel means (e.g., car). China, as the most populous country in the world, has started the motorization process, and its results will have huge impact on the whole world in terms of transportation, energy, environment and automobile market.
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