摘要
两系杂交稻培杂山青始穗期供给氮、钾营养，可提高结实期剑叶光合速率、叶绿素（ａ＋ｂ）含量和稻谷产量，但对叶绿素ａ／ｂ值影响小。始穗期供给氮及氮钾营养对培杂山青的效应比对三系杂交稻汕优６３的效应更明显。
Using two-line hybrid rice Peizashanqing and three-line hybrid rice Shanyou 63 as the materials, the effects of nitrogen and potassium at initial heading stage on photosynthetic rate of flag leaf and grain yield were studied by way of pot culture with four treatments, i.e., Blank (B, no fertilizer application), NPK (check, applying N、P、K as basal fertilizer), NPK+N (applying nitrogen fertilizer at initial heading stage besides N、P、K basal fertilizer) and NPK+NK (applying nitrogen and potassium fertilizers at initial heading stage besides NPK basal fertilizer). The results showed that the effects on increasing photosynthetic rate of flag leaf, chlorophyll (a+b) content in late stage and grain yield were distinctly different among the four treatments (NPK+NK>NPK+N>NPK(CK)>Blank), while the effect on a/b ratio was similar. Furthermore, the effects in Peizashanqing were greater than in Shanyou 63, resulting in a higher grain yield of Peizashanqing (13.9% and 12.2% higher than that of Shanyou 63 by NPK+NK and NPK+N, respectively).
出处
《杂交水稻》
CSCD
北大核心
1998年第6期26-28,共3页
Hybrid Rice
基金
广东省科委基金
中山大学211前沿研究课题
广东省两系稻利用研究合作攻关项目
关键词
两系杂交稻
始穗期
氮钾营养
光合速率
稻谷产量
two-line hybrid rice
Peizashanqing
nitrogen and potassium at initial heading stage
photosynthetic rate
chlorophyll content
yield
