5.3.1 Coating effects on seedling growth
The addition of hydro-absorber coating to seeds affected the growth of seedlings of either variety independent of soil moisture deficit. Under FC both coatings reduced the total biomass produced, LA and the root:shoot ratio in Piper compared to that of the uncoated seeds (Fig. 1). Stockosorb containing coats slightly enhanced root length in Piper, whereas coating with Geohumus resulted in significantly reduced root length when compared to the uncoated seeds (Fig. 1j-l). Susu seedlings on the other hand responded differently to coating treatments. At field capacity, Stockosorb containing coats did not negatively influence biomass, LA, root:shoot ratio and root length which were decreased in seeds coated with Geohumus (Fig. 2). Both coatings significantly reduced seedling height at FC in Piper although similar seedling heights were observed under drought stress (Fig. 3). Seedlings growing from Susu seeds having Stockosorb in their coats were tall irrespective of the moisture content meanwhile those resulting from Geohumus coated seeds promoted growth under drought conditions and not when fully watered (Fig. 2).Under fully watered conditions, the second and third leaf elongation rate was reduced in seedlings growing from Geohumus coated Susu seeds meanwhile in seedlings growing from Piper coated seeds, the second leaf elongation rate was reduced by both coatings while the third leaf elongation rate was reduced by both coatings only at the 11 and 13 days after soaking (Table I). Expansion rate of the second and third leaves was higher in seedlings resulting from Geohumus coated Susu seeds meanwhile in Piper significant reduction in expansion rate were observed when seedlings were coated with Stockosorb (Table II).
5.3.1 เคลือบผลแหล่งเจริญเติบโตThe addition of hydro-absorber coating to seeds affected the growth of seedlings of either variety independent of soil moisture deficit. Under FC both coatings reduced the total biomass produced, LA and the root:shoot ratio in Piper compared to that of the uncoated seeds (Fig. 1). Stockosorb containing coats slightly enhanced root length in Piper, whereas coating with Geohumus resulted in significantly reduced root length when compared to the uncoated seeds (Fig. 1j-l). Susu seedlings on the other hand responded differently to coating treatments. At field capacity, Stockosorb containing coats did not negatively influence biomass, LA, root:shoot ratio and root length which were decreased in seeds coated with Geohumus (Fig. 2). Both coatings significantly reduced seedling height at FC in Piper although similar seedling heights were observed under drought stress (Fig. 3). Seedlings growing from Susu seeds having Stockosorb in their coats were tall irrespective of the moisture content meanwhile those resulting from Geohumus coated seeds promoted growth under drought conditions and not when fully watered (Fig. 2).Under fully watered conditions, the second and third leaf elongation rate was reduced in seedlings growing from Geohumus coated Susu seeds meanwhile in seedlings growing from Piper coated seeds, the second leaf elongation rate was reduced by both coatings while the third leaf elongation rate was reduced by both coatings only at the 11 and 13 days after soaking (Table I). Expansion rate of the second and third leaves was higher in seedlings resulting from Geohumus coated Susu seeds meanwhile in Piper significant reduction in expansion rate were observed when seedlings were coated with Stockosorb (Table II).
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