行政院農業委員會台南區農業改良場  研究彙報第11號

黑皮波羅門參肥料三要素適量研究

黃和炎

摘  要

本試驗在嘉義縣六腳鄉及雲林縣崙背鄉兩處舉行,由三要素配合10個組合處理,於66年10月播種,翌年3月收穫,生育日數約130天。黑皮參主要受氮營養所影響,不論根長、葉長、根重、葉重均受氮肥所左右;即氮肥少量則根細小,產量低,過多氮肥則鬚根多或生疣瘤(swelling)致影響根之雅觀。

三要素適量範圍估計在N 90 Kg/ha,P2O5 45Kg/ha,K2O 60-120 Kg/ha,六腳試驗地K2O需要量較高,可能與其土壤有效鉀較低有關。


NPK Requirement of Black Salsify

H. Y. Huang

Summary

        This experiment was carried out at Liockiao (Chiayi Hsin) and Lunpei (Yunlin Hsin).  Ten incomplete combinations of NPK rates were compared.  Black salsify was sown in October 1997 and harvested in the following March; the growth period was 130 days.  The growth characters of black salsify were mainly affected by the nitrogen nutrition.  The root length, leaf length, leaf weight and root weight were all influenced by nitrogen rates; the lower the nitrogen rate; the lower the nitrogen rate, the shorter the root and the lower the root yields.  Too much nitrogen application, however, resulted in an increase of fibrous roots or swelling of the main root, affecting its appearance.

        Based on the results of the two experimental sites, it may be concluded that the optimum nutrient rates for black salsify are: N, 90 kg/ha; P2O5, 45 kg/ha; K2O, 60~120 kg/ha.  The K2O rate required at Liockiao was higher than at Lunpei, probably of the lower soil available K2O in the former case.



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