云南松苗木生长对水肥和IBA的响应试验

Effects of Fertilization,Irrigation and IBA on Growth of Pinus yunnanensis seedlings

对施有机肥、水分控制和IBA叶面喷施3因素采用U12(6×3×2)混合均匀试验设计,并置于裂区的温棚和松针覆盖下同时实施,苗龄210天时测定地径和苗高。结果表明,3个因素不同水平组合在温棚设施下的云南松苗木平均地径和苗高(1.36 mm和6.99 cm)极显著地大于松针覆盖的云南松苗木平均地径和苗高(1.17mm和5.95 cm)。施肥是影响温棚与松针覆盖小环境云南松苗木地径和苗高的关键因子,其优水平组合温棚设施下为施肥4.0 kg·m-2,每2天浇水1次,不喷施IBA溶液的组合,松针覆盖下则为施肥5.0 kg·m-2,每2天浇水1次,叶面喷施0.2 g·L-1的IBA溶液的组合,平均苗高分别为9.34 cm和7.50 cm。方差分析结果表明,施肥和水分控制分别对温棚云南松苗木的苗高生长表现出显著和极显著的影响(0.01<P施肥=0.039<0.05,P水分=0.005<0.01),IBA叶面喷施对松针覆盖的云南松苗木地径生长具有极显著的影响(P=0.008<0.01)。

The U12 （6 ×3 ×2） mixed-level uniform experimental design was applied to study the effects of three factors fertilizer, irrigation and IBA on the growth of 210 days old Pinus yunnanensis seedlings under the split trail design of greenhouse and pine-needle cover in nursery. The results showed that the mean basal diameter and height of the seedlings in greenhouse were 1.36 mm and 6. 99 cm respectively, which were significantly higher than 1.17 mm and 5.95 cm of pine-needle cover treatment. Fertilization was the main factor for basal diameter and height growth under different facilities. The optimal treatment combination for seedling growing in greenhouse was A1B1C1 （organic fertilizer 4.0 kg· m-2 mixing in the media, irrigation every two days without IBA spraying on the leav- es） , and that for pine needle cover method was A2B1 C2 （organic fertilizer 5.0 kg · m-2 mixing in the media , irri- gation every two days with 0.2 g · L-1 IBA spraying on the leaves）. The average height of seedlings treated by these two approaches reached 9. 34 cm and 7.50 cm respectively. The ANOVA results indicated that there were significantly different effects of the fertilization （p =0. 039 〈0.05） and irrigation （p =0. 005 〈0. 01 ） on height of seedling growing in greenhouse, and basal diameters with pine-needle cover were significantly influenced by IBA spraying on the leaves （p =0. 008 〈0. 01 ）.