受钙影响的花生生殖生长及种子素质研究

Study on reproductive growth and seed quality of peanut as affected by calcium supply

采用砂培试验结合电子探针等分析方法研究受钙影响的花生生殖生长及种子素质。结果表明 ,低钙导致花生花粉外观变形 ,花粉壁松弛 ,淀粉粒小而稀少 ;电子探针下花生壁K峰升高 ,Ca、P、S和Si峰降低 ,从而影响花粉活力。在一定供钙范围 ,花生总花数、可育花数及产量随供钙增加而增加 ,影响总花数临界供钙水平为 0 6cmol(+ ) /kg ;影响可育花数及产量的临界供钙水平平均为 1 2 (+ ) /kg。花生种子钙含量与供钙水平呈显著直线相关 ,其直接影响种子发芽率和出苗率。 95%以上的花生发芽率和出苗率分别要求种子钙含量不低于 2 35和 2

Sandy culture experiment, combined with X ray microanalysis, was used to investigate reproductive growth and seed quality of peanut as influenced by calcium supply Results indicated that low Ca supply led to abnormal shape of peanut pollen, flaccid and expensive pollen wall , smaller and sparse starch particles Higher K peak and lower Ca, S and Si peaks were found in pollen wall with low Ca supply under X ray microanalysis, thus in turn make vigor of pollen reduced Total numbers of flowers, the fertile flowers and yield increased with the increase of calcium supply The critical Ca level of influencing total number of flowers was 0 6cmol(+)/kg, while both of those influencing fertile flowers and yield were 1 2cmol(+)/kg The significant linear correlation existed between seed Ca content and Ca supply, and the germination and seedling survival of peanut seeds were influenced directly by seed Ca content, 235 mg/kg and 278mg/kg of seed Ca contents were requested for 95% of germination and seedling survival, respectively