氮磷钾钙配施对岩樟幼苗生长的影响

Effects of Combined Application of Nitrogen,Phosphorus,Potassium and Calcium on the Growth of Cinnamomum saxatile Seedlings

以岩樟为研究对象,采用N、P、K、Ca 4因素4水平正交试验设计,探讨不同水平氮磷钾钙肥配施处理对岩樟1年生幼苗地径和苗高生长的影响,旨在为岩樟苗木施肥提供科学依据。结果表明,氮磷钾钙肥配施时间为30~150 d,岩樟地径和苗高总体呈增加趋势,平均值达首次施肥前的1.11~1.61倍以及1.23~2.17倍;不同施肥处理对岩樟苗木地径和苗高生长量的影响显著,生长表现最优的是T_(8)(N_(1)P_(3)K_(2)Ca_(1))配施组合;氮肥对岩樟苗木地径和苗高的影响显著,磷、钾肥的影响均不显著,钙肥对苗高的影响显著,对地径的影响不显著,地径生长量在N_(1)(100 mg/株N)水平达到最大。综上所述,肥料配施处理N_(1)P_(3)K_(2)Ca_(1)(100 mg/株N+80 mg/株P+40 mg/株K)为该研究条件下促进岩樟幼苗生长的最佳施肥组合。

Using Cinnamomum saxatile as the material,a four-factor and four-level orthogonal design was adopted to explore the effects of proportional fertilization of N,P,K,Ca on the growth of one-year-old C.saxatile seedlings.The purpose of the study was to provide scientific basis for fertilization of C.saxatile.The results showed that the diameter and height of C.saxatile increased in general when the application time of N,P,K and Ca fertilizers was 30-150 d.The average value was 1.11-1.61 times and 1.23-2.17 times than the first fertilization.The effects of different fertilization treatments on the diameter and height of C.saxatile seedlings were significantly different.The best performance of growth was the combination of T_8(N_(1)P_(3)K_(2)Ca_(1)).The effect of N fertilizer on the diameter and height of C.saxatile seedlings was significant,but the effect of P and K fertilizer was not.The effect of Ca fertilizer on height was significant,but not on diameter.The diameter growth reached the maximum at N_(1)(100 mg/plant N)level.In conclusion,N_(1)P_(3)K_(2)Ca_(1)(100 mg/plant N+80 mg/plant P+40 mg/plant K)was the most suitable fertilizer combination to promote the growth of C.saxatile seedlings under the study conditions.