为扩大油茶栽培面积,提高安徽大别山区油茶产量,在对大别山地区的舒城、潜山和太湖油茶种质资源调查的基础上,通过一系列外业调查......

采用人工低温处理结合电导法,测定了10个桉树无性系在未锻炼、锻炼与脱锻炼等不同处理下冻害胁迫抗性的半致死温度。研究结果表明,......

试验0.42%Cu Hi—B钢（/%：0.10C,3.25Si,0.16Mn,0.019P,0.011S,0.021Als,0.42Cu）由实验室感应炉熔炼,浇铸成15 kg锭,开坯成60 mm方坯,......