福岡県農業総合試験場研究報告22(2003) pp 6 - 10
福岡県における水稲新品種の窒素吸収特性
第４報 ‘夢つくし’の窒素吸収量の推定
荒木雅登・山本富三・満田幸恵
（生産環境研究所）
良食味品種‘夢つくし’の移植25〜45日後における窒素吸収量と草丈，茎数および葉色等との関係について調査した結果， 生育調査時までの日平均気温を加味することで，移植45日後までのすべての時期に適用できる窒素吸収量の推定式が得られた。
y ＝0.181＋0.0109×h ・n ・s ・e
y ：窒素吸収量(gm-2)，h ：草丈(cm)，n ：茎数(本m-2)
s ：葉色(葉緑素計による測定値)
e ：有効積算温度(＝Σ(TD−BT))
TD ：日平均気温(℃)，BT ：有効下限温度(＝16℃)
[キ−ワ−ド：有効積算温度，窒素吸収，水稲，夢つくし]
Influence of Varietal
Characteristics and Uptake
of Nitrogen on the Growth,
Yield and Quality
of Rice in Fukuoka Prefecture (4). Estimation of
Nitrogen Uptake for the Rice Variety of 'YUMETSUKUSHI'. ARAKI
Masato, Tomizou YAMAMOTO
and Yukie MITSUDA
(Fukuoka Agricultural Research
Center, Chikushino, Fukuoka
818-8549, Japan) Bull.
Fukuoka Agric. Res. Cent. 22: 6 - 10 (2003)
To establish the method for the estimation of nitrogen(N) uptake for
the rice variety 'YUMETSUKUSHI', we examined the relationship between amounts
of N uptake at 25〜45 days after transplanting and product plant height,
number of tillers, leafs color. The research showed that it was available for
the estimation of N uptake to take an air temperature into consideration to
improve the precision. The results revealed that a regression equation could be
applied from transplanting till 45 days after. It’s as follows.
y = 0.181
+ 0.0109×10-3･h･n･s･e
y:amout of
N uptake (gm-2), h:plant heigt (cm), n:number of tillers per m2,
s:green meter value,
e:effective accumulative temperature ( = Σ(TD-BT) )
TD:daily mean air temperature (℃), BT:base
temperature ( = 16℃)
The method of estimation was superior in length of an
applicable period and applicability of changing meteorological condition to
current methods.
[Keyword: Effective accumulative temperature, Nitrogen uptake, Rice, YUMETSUKUSHI]