唐山新区常庄乡１９９９年棚（室）蔬菜栽培面积发展至７０ｈｍ２（公顷），但据近期调查发现：棚（室）蔬菜在施肥措施上还存在一些不容忽视的问题。一是有机肥使用量小，且不腐熟，常常造成烧苗、烂根和招致虫害为害；二是速效氮、磷、钾肥配比不合理，导致徒长，化果、落果 In Tangshan New District, Changzhuang Township, in 1999, the greenhouse cultivation area grew to 70hm2 (hectare). According to recent surveys, there are still some problems that can not be neglected in fertilizing measures. First, the use of organic fertilizer is small, and not rotten, often resulting in burning seedlings, rotten roots and lead to insect damage; Second, available nitrogen, phosphorus and potassium ratio is unreasonable, leading to leggy, fruit, fruit drop