Influence of watering regimes at different growth stages on the cupping incidence of chin-guen-tsai [Brassica chinensis]
2005
Yoshida, S.(Chiba-ken. Agriculture Research Center (Japan)) | Inoue, M. | Udagawa, Y. | Aoyagi, S.
The present experiments were conducted to clarify the effect of watering regimes at the three stages during transplant raising in plug trays, just after transplanting the seedlings, and after establishment of the transplants of chin-guen-tsai (Brassica campestris L. chinensis group) on the incidence of cupping, which were found in the middle of leaves as rolling, in the summer and the winter season crops. l. I the summer and the winter season crops, watering of large quantity-low frequency and watering of small quantity-low frequency during plant raising, which induced temporary wilting, decreased the cupping outbreak at harvest and increased the yield and quality. 2. In the summer season crop, watering of large quantity-low frequency at just after transplanting which caused wilting of seedlings temporarily decreased the cupping outbreak at harvest. In the winter season crop, there was no influence of watering regimes just after transplanting. 3. In the summer season crop, there was a strong influence of watering regimes after the establishment on the growth and outbreak of the cupping. Almost no plants produced any marketable yield at the regime without watering. Watering regime with high frequency, which maintained stable soil moisture content during the growth period, decreased outbreak of cupping at harvest and increased the yield and quality. Although there was little influence of watering regimes in the winter season crop, the regimes which maintained the high soil moisture content after the establishment reduced outbreak of cupping.
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