摘要
选取8年生油松人工林,将其用来研究复合肥使用量对树高、胸茎的影响。结果表明,每株施用200g复合肥后的效果最佳,并且其胸茎、树高连年生长量均达到了最大值。其中在施肥第4年,胸茎、树高连年生长量分别是对照的1.61倍、1.95倍、5.4倍。根据本文的研究结果,在对油松幼龄林施肥过程中,可以考虑采用200g/株复合肥。
The design of pool structure has its specific technical requirements. Design, first of all to determine the load, to the bottom of the pool, pool wall strength calculation and cracking strength and crack width checking and so on ; the second is groundwater empty Pool Float checking and pond full of anti - crack calculation ; the large pool of post pouring belt reasonable settings. Only in this way can we ensure the safety and economic rationality of the design of the tank structure.
出处
《林业科技情报》
2016年第1期48-49,共2页
Forestry Science and Technology Information
关键词
油松
施肥
树高
胸茎
PinusTabulaeformis
fertilizer
tree height
DBH
