The Influence of Materials for Surface Mulching on Soil Temperature and Vegetative Growth of Apple Nursery Trees
2011
Sagong, D.H., Apple Research Station, National Institute of Horticultural and Herbal Science, RDA, Gunwi, Republic of Korea | Lee, S.J., Gyeongnam Geochang Agricultural Technology Center, Geochang, Republic of Korea | Han, S.G., Kyungpook National University, Daegu, Republic of Korea | Yoon, T.M., Kyungpook National University, Daegu, Republic of Korea
This study was conducted to investigate the influence of different polyethylene film (P.E. film) for mulching on the changes in soil temperature and the production of good feathered apple nursery trees. M.9 rootstocks with stem diameter of 9.1~11.0 mm were planted in plots covered with different P.E. film (i.e., transparent P.E. film, black P.E. film, and bare soil as control). Three weeks after planting, the rootstocks were veneer grafted with 'Sinano Sweet' apple cultivar. In the middle of June, BA was sprayed to nursery for inducing feathering during the growing season. The soil temperature of the control was higher than air temperature by about 0.7℃ from mid April to early October, and that of P.E. film mulching was about 1~5℃ higher than that of the control. The soil temperature under transparent P.E. film was about 2~3℃ higher than that under black P.E. film. The diurnal range of soil temperature under the black P. E. film was lowest among all treatments. The P.E. film mulching induced better tree growth and feathering than bare soil. Percentage of good feathering apple nursery of black P.E. film was highest among all treatments because the soil temperature unuder black P.E. film in the early growing season was higher than that of the control and the number of days when the maximum soil temperature was over 35℃ in the summer was lower than that under the transparent P.E. film.
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