摘要
采用不同的模型 ,定量地研究了不同播期不同基因型油菜干物质积累、分配与转移规律。结果表明 :油菜总干物质积累动态可拟合成 L ogistic模型。油菜根、茎枝、叶干物质分配呈现出多项式函数的变化规律 ,角果干物质分配表现为 L ogistic曲线的变化特征。晚播油菜干物质冬前优先分配给叶 ,角果发育成熟期优先分配给角果并主要给籽粒 ,且收获指数较大 ,但其总干物质积累低 ,因而经济产量低。早播油菜前期具有较大的干物质积累优势 ,后期具有较高的表观输出率和较大的日积累量 ,这种表现主要受播种期的影响 。
In order to ascertain the physiological and ecological mechanism of high yield formation of rapeseed, the characteristics of dry matter accumulation, distribution and transfer of rapeseed genotypes in different sowing date were quantitatively studied using different models. The results indicated that: The accumulative dynamics of mass of dry matter are simulated by Logistic model. The distribution pattern in root, stem and branch, and leaf corresponds to multinomial function model, and the pattern in pod corresponds to Logistic equation. The dry matter of the late sown rapeseed is prior to be distributed to leaves before winter, to pods and mainly to seeds at pod formation stage, and its harvest index is higher, yet its yield is lower because of the lower dry matter accumulation. The apparent output ratio and the amount of dry matter accumulation per day of the early sown rapeseed are higher than those of the late sown, and these are mainly affected by sowing date, not the rapeseed genotypes.
出处
《作物学报》
CAS
CSCD
北大核心
2002年第1期52-58,共7页
Acta Agronomica Sinica
基金
湖南省科委重点 (0 1-95 2 -0 1)
湖南农业大学青年基金资助项目 (990 1)
