摘要
本试验用１／４强度的ＫｉｍｕｒａＢ营养液将籼稻、粳稻和籼型杂交稻各１１份，分别培养到三叶期后，以含有０．２６５μｍｏｌ／ＬＨ２Ｏ２，０．２ｍｍｏｌ／ＬＣａＳＯ４加０．１或０．２或０．３或０．４ｍｍｏｌ／ＬＫ＋的营养液为测定介质，在２５±２℃，连续自然光照下，运用离子耗竭技术分别测定了各种不同钾浓度下灿稻、粳稻和杂交稻不同基因型的吸钾速率。并于三叶期和五叶期分别测定这三类基因型的生物量和钾素利用效率。结果表明，筛选籼稻和粳稻高效吸钾基因型的合适钾浓度都为０．２ｍｍｏｌ／ＬＫ＋，筛选杂交稻的合适钾浓度为０．４ｍｍｏｌ／ＬＫ＋。比较钾素利用效率的基因型差异时，五叶期明显优于三叶期。
Three leaf stage seedlings were investigated for intake rates of potassium in each 11 genotypes of O.japonica, O.indica and O. indica hybrid at different K+ levels according to ion depletion. Potassium utilization efficiencies at 3 leaf stage were compared with those at 5 leaf stage to screen efficient genotypes. The suitable potassium levels were 0.2mmol / L for both O. japonica and O. indica and 0.4mmol/ L for O. indica hybrid. Five leaf stage was much better than 3 leaf stage for comparison of genotypic differences in K utilization efficieny.
出处
《土壤学报》
CAS
CSCD
北大核心
1996年第2期113-128,共16页
Acta Pedologica Sinica
关键词
水稻
离子耗竭技术
吸钾速率
钾素利用效率
Ion depletion technique
Potassium intake rate
Potassium utilization efficiency
