密度處理對不同粒型玉米青割及子粒產量之影響

Effects of Plant Density on Forage and Grain Yield of Maize with Different Kernel Types

謝光照(G. J. Shieh) ； 盧煌勝(H. S. Lu)

《中華農業研究》 41卷3期 (1992/09) Pp. 233-240

https://doi.org/10.29951/JARC.199209.0002

摘要

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。在不同密度處理下，單株鮮重及乾物重，在春秋作均以馬齒種×硬粒種及硬粒種×硬粒種優於馬齒種×馬齒種；整株乾物率、果穗百分比、總營養消化率及子粒產量，於春秋作下，三種粒型組合問略有變動，但概以馬齒種×硬粒種居首。同時考慮青割鮮重、乾物重、整株乾物率、果穗百分比、總營養消化率及子粒產量六項性狀，單交組合中以馬齒種×硬粒種或硬粒種×硬粒種較優，而栽培密度以70公分×20公分為宜。

關鍵字

玉米 ； 栽培密度 ； 馬齒種 ； 硬粒種

並列摘要

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. Whole-plant dry matter content, ear percentage and total digestable nutrient percentage (TDN) were less influenced. Among combinations, dent × flint and flint × flint were better than dent × dent for fresh and dry weight per plant. Various responses among kernel type combinations for whole-plant dry matter content and grain yield were found. However, in most cases dent× flint was the leading combination for these traits. It is suggested that the combination of dent × flint or flint × flint, and plant density of 70×20cm would be the best arrangement, if both forage and grain yield are concerned.

並列關鍵字

Maize Zea mays L. ； Plant density ； Kernel type ； Dent ； Flint