It contributes substantially to adolescent motor vehicle crashes, other traumatic injuries, suicide, date rape, and family and school problems. 它诱使青少年撞车,外伤,自杀,约会强奸,还导致家庭和学校问题。
Effect of Sowing Date on Winter-Survival Rate and Physiological and Biochemical Characteristic of Winter Rape 播期对冬油菜越冬率及生理生化特性的影响
The fertility indices of each male sterile line were reduced and the sterile rate was increased with the postpone of sowing date, according to the sowing experiment of four rape male sterile lines. 对4个甘蓝型油菜不育系在湛江地区进行不同播期试验,结果表明:各不育系的育性指数随播期推迟而降低,不育株率随播期推迟而上升。
Density increases to poor rapeseed individual development, late oilseed rape due to the delay of sowing date, rape individual dwarf and seedling nutrient accumulation less, by close planting, to supplement the shortage of rapeseed ontogenetic group advantages. 密度的增加使油菜个体发育较差,迟直播油菜由于播期的延迟,油菜个体矮小,苗期营养物质积累较少,可通过合理密植,以群体优势弥补油菜个体发育的不足。