密度處理對不同粒型玉米青割及子粒產量之影響

Abstract

九個玉米單交品系，包括馬齒種及硬粒種間之三種組合，進行二期作之栽培密度（70×20公分、70×25公分及70×30公分）試驗。試驗結果顯示，不論春作或秋作環境下，單位面積之青割鮮重、乾物重及子粒產量，均隨栽培密度每公頃47,600株至71400株之增加而提高，密度處理對整株乾物率、果穗百分比及總營養消化率(TDN%)未有顯著影響。A total of nine maize hybrids including dent and flint combinations were grown in three plant densities (70×20cm, 70×25cm, 70×30cm) at TART in spring and fall crop of 1988. Effects of plant density on forage and grain yield of maize were investigated. From plant density of 47,600 plant/ha to 71,400 plant/ha, significant increase of fresh weight, dry weight and grain yield per hectare was associated with increasing plant density.