Response of Rice Variety to Plant Spacing and Nitrogen Fertilization

Abstract

The responses of two japonica rice varieties, Chianung 242 and Tainan 3, to four spac-ings and three levels of nitrogen were studied over a 3-year period from 1965 to 1967 at Tai-tou-ken Farm of the Chiayi Agricultural Experiment Station. Grain yields increased with the reduction of spacing and the increase of nitrogen which was more pronounced in the first crop of rice. The effects of plant spacings and nitrogen levels on grain yields were all significant at the 1% level of probability in both crops. 本文係報告嘉義農業試驗分所自民國54年第1期作起至56年第2期作承辦全省性水稻寬行密植試驗之綜合報告。 栽植密度及氮素肥料之提高均能導致稻谷之增產，其效果在第1、2期作均極為顯著，水稻品種在第1、2期作對栽植密度均顯示直線效應，惟對肥料效應則因品種及期作而異。