摘要
在高产栽培条件下,以多穗型、中穗型、大穗型3种类型9个小麦品种为材料,研究了高产小麦的产量性状及其光合生理特性。结果表明,在关中灌区生产条件下3种类型品种都能获得高产,但中德型和大穗型具有更大的产量潜力;与丰产品种相比,高产品种籽粒灌浆期的叶面积系数(LAI)、旗叶净光合速率(Pn)、叶绿素(Chl)含量及丙二醛(MDA)含量等几个重要生理指标均表现出明显优势,叶功能期持续期长、净光合速率高而衰减速率慢是高产品种籽粒产量高的重要生理原因。
The research was carried out on the yield formation and physiological characters of high yield wheat by using 9 wheat cultivars with three types such as multi-spike genotype., middle-spike genotype and large-spike genotype as test materials. The results indicated that in Guanzhong region cultivars with three types all could gain high yield,but middle-spike genotype and large-spike genotype had more potential than the multi-spike genotype. Comparing with bumper yield cultivars, high-yield cultivars had obvious superiorities in LAI, chlorophll content, net photosynthesis rate and MDA content of flag leaves during filling period. The main physiological reasons of high grain yield were of having longer leaf function sustain period,higher net photosynthesis rate but slower descent spead of Pn in filling stage.
出处
《干旱地区农业研究》
CSCD
北大核心
2003年第2期122-125,共4页
Agricultural Research in the Arid Areas
基金
农业部农业结构调整技术专项(2002-02-1A-01)
