croppi相关论文
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
对三峡库区花岗岩坡耕地不同种植方式下水土流失规律的定位研究表明,库区雨季主要集中在5~8月,降雨量约占全年总降雨量的60%以上;此期间......
探明不同种植体系周年产量、气候资源分配及其利用效率特征,建立周年气候资源优化配置的定量指标,为进一步提升黄淮海区域周年产量......
1994年利用密闭箱法观测了广州地区早稻和晚稻CH4的排放,结果CH4平均排放通量早稻为0。22-3.81mg/m^2.h,晚稻为0.36-17.63mg/m^2.h。常规CH4排放明显低于国内其服稻区,对其原因进行了初......
This study used time-series of global inventory modeling and mapping studies(GIMMS) normalized difference vegetation ind......
Tillage and straw mulching impacts on grain yield and water use efficiency of spring maize in Northe
A two-year field experiment(2012–2013) was conducted to investigate the effects of two tillage methods and five maize s......