【摘 要】
：
该育苗技术规程适用于福州地区与自然环境条件相近地区的芦柑、雪柑、等品种苗木培育。 1.苗圃 1.1.圃地的选择 1.1.1.地势应选择开阔向阳、避风的平原地和缓坡地(坡度在5度
论文部分内容阅读
该育苗技术规程适用于福州地区与自然环境条件相近地区的芦柑、雪柑、等品种苗木培育。 1.苗圃 1.1.圃地的选择 1.1.1.地势应选择开阔向阳、避风的平原地和缓坡地(坡度在5度内),排水良好,切忌易积水或积存冷空气
The nursery technical regulations apply Fuzhou area and natural environment conditions similar areas of citrus, Xuegan, and other varieties of nursery stock cultivation. 1. Nursery 1.1. Choice of nursery land 1.1.1. The terrain should be open and sunny, sheltered plain and gentle slope (slope within 5 degrees), well drained and should not be easy to accumulate water or cold air
其他文献
The exhaust gas aftertreatment systems in automotive applications have become quite complex and expensive, due to progressively tighter emission limits for
Introduction The study deals with the design of efficient exhaust gas cleaning system for biogas engines with particular reference to the development of act
一,田间症状识别本病以树冠上部和外围发生较多。进行产地调查时要特别注意对感病品种(甜橙、酸橙等)的检查。夏秋新梢、嫩叶和幼果较易发病,春梢和夏秋梢宜在5月下旬至7月
Monolithic catalysts have attracted much attention due to their higher thermal stabilization, the better mechanical strength, the bigger specific surface ar
女儿前年结婚,一年后给我提了个“高级职称”——去年8月,她生了个男孩,我在家庭中就当起了外公。小家伙还没有出生,我就关心起孩子的成长了。我读过
My daughter got marri
无锡市郊区的茭白主要产区有3000多亩,1970～1979年,秋茭平均亩产仅为750公斤(净茭肉,下同)左右,1980年以来,抓了选种、寄秧等措施,1983年秋茭的亩产已分别提高到1000公斤左右
父母总是教育孩子要讲卫生,要注意清洁。美国研究人员发现,皮肤表面一些细菌有助阻止发炎,过度清洁反而可能有害健康。
Parents always educate their children to talk abo
十月中旬以后,北京地区青椒上市量极少,价格较高,因此,利用北方冬季低温,在产地用半地下式通风窖进行贮藏,既可延长青椒供应期,又可增加农民收入,是一举两得的事,具体方法介
In the conventional packed bed reactor with pellet catalysts, the pellet catalysts shows low effective activity which are attributed to heat and mass transf