发布时间:2025-02-05 03:33:25
葡萄苗一般枝条比较嫩,越冬容易被冻坏,防冻一方面从自身开始防护,另一方面从外部防护。自身防护一般会在越冬前多用磷钾肥料增强木质化积累,使用快活林植物防冻剂预防。物理防护可以通过刷果树涂白剂,或者直接压弯埋在土里面,上面覆膜或者稻草等到处春天暖和了再扒出来。
楼板在楼梯处怎么开洞用pkpm软件是按照楼梯的形状开洞还是整块大板都开洞
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