发布时间:2025-01-24 19:27:47
茶花幼苗培育不宜用瓷盆、塑料盆,用泡水1至2天然后晾干的新泥瓦盆为宜,盆器稍深为好,以瓦片、煤渣、碎石等填充底部约四分之一,以利排水;盆器口径一年苗9-11厘米适宜,二年苗12-14厘米适宜。培养基质应选用微酸性、肥沃、排水良好的混合土,可用沙质壤土、腐叶土、细砂土以5:3:2比例配制,忌用碱性土或黏性土。
消防系统接地利用大楼综合接地装置作为其接地极这句话中的综合接地装置是什么意思
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