第8染色体22.4 ~ 23.6位点上检测到成熟期影响稻谷产量、稻草氮素含量、稻谷氮素含量和氮素籽粒生产效率等性状的QTL；
Morever, at mature stage, QTLs for GY, rice straw nitrogen content, grain nitrogen content, NGPE were located at 22.4 ~ 23.6 on chromosome 8;
整体式拉坯辊装置具有结构轻便简单，安装更换方便，使用寿命长，能有效提高铸坯质量，降低成本及明显提高水平连铸机生产效率等优点。
The latter has advantages of portable and simple configuration, installing and replacing conveniently, long applying-life, effectively improving billet quality, reducing cost a...
布莱克说：“他们提高了生产效率，改良了作物品种，并运用诸如免耕直播及全球定位系统等手段改进耕作方式。
They are getting a lot more efficient; they have a lot better crop genetics and agronomic practices like no-till farming and things like GPS [satellite-dependent global positioning system].
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