Effects of culture solution concentration in rock wool slabs before planting on tomato [Lycopersicon esculentum] early growth
2009
Suzuki, K.(National Inst. of Vegetable and Tea Science, Taketoyo, Aichi (Japan)) | Kawasaki, Y. | Sasaki, H. | Yasuba, K. | Nakano, A. | Takaichi, M.
It is necessary to control the tomato plant vigor when direct planting plug seedlings in rock wool slabs. We investigated the effects of culture solution concentration in the slabs before planting on plant early growth after planting, when direct planting and when the planting with a second nursery. Electric conductivity in the slabs was decreased gradually 3 weeks after planting in both cases. The concentration of the culture solution in the slabs before planting affected the stem thickness under the first truss, leaf weights, and incidence of blossom-end rot of the first truss. However, there were no clear differences in yield of tomato fruits from the second till forth trusses. Plant vigor of direct planting was stronger than that of planting with the second nursery, and the plant vigor was stronger as the concentration of culture solution in the slabs before planting increased. We concluded that direct planting in the rock wool slabs was possible by the control of plant vigor using low concentration culture solution in the slabs before planting.
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