Abstract
A nursery experiment was conducted to study the effect of phosphatefertilizer application on seedling growth and stump quality of teak seedling.The pre-conditioned 8 months-old teak drupes (fruit with seed) were placedfor germination in the nursery bed. The experiment consisted of seventreatments replicated four times. The number of seedlings emerged/4m2was observed at 28 days after sowing (DAS) and, 2,3,4,5 and 6 months aftersowing (MAS). The results revealed that the application of different levelsof P2O5 did not have any significant effect on number of seedlings/4m2 ofteak up to 4 months after sowing, whereas the significant influences wereobserved at 5 to 6 months after sowing. Significant differences were alsoobserved in root length, shoot length and stump girth at 6 months aftersowing due to P fertilization levels. The correlation relationship of teakgrowth parameters with post-harvest soil revealed the positive and significantcorrelation of teak root volume and dry matter with soil available P statuswas observed. The results suggest that the application of 60 kg P2O5/hain teak nursery bed enhanced the seedling growth and stump quality of 6months-old teak nursery plants through enhanced P availability
Highlights
Teak plantations increased substantially over the years and currently, India has 44 percent of the global teak plantation (4.35 million ha)
The experimental results revealed that the application of phosphorus fertilizer did not have any significant effect on number of seedlings/4m2 up to 4 months after sowing
The present results are supported by the study by Sonker and Kubhare (1991), who have reported that the effect of fertilizer application and growth of 5-month-old teak seedlings revealed that 100 kg of phosphorus, 150 kg potash and 200 kg nitrogen/ ha had a significant response in terms of increased the root length, shoot length, collar girth, when compared to control treatment
Summary
Teak plantations increased substantially over the years and currently, India has 44 percent of the global teak plantation (4.35 million ha). India has the major share of the total area under teak plantations, followed by Indonesia (Kollert and Walotek, 2015). In India, natural zone of teak distribution is mainly confined to the peninsular region below 24-degree latitude. Teak plantations are generally established either through seedling mainly sourced from unknown seed origin and a limited quantity from seed orchards/ seed production areas/tissue culture of selected superior trees (Arun Dev et al, 2020). Nursery beds were established in red soil field with sandy loam texture. Nursery soil needs to be ameliorated with suitable amendments and nutrient. It was aimed to clarify the stalemate situation of soil conditions for supporting germination, seedling growth and stump quality of teak. The focus was given to explore the possibility of utilizing the phosphorus fertilizer in the form of superphosphate as a component of nursery media at an optimum level
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