不同基因型烤烟钾吸收特性差异及吸收机理  

Difference of potassium absorption characters and mechanism of tobacco in genotypes

作　　者：何冰[1,2] 韩助君 薛刚[1] 邢雪霞[1] 许晓敬 徐世晓[1] 张小全[1] 杨铁钊[1] 

机构地区：[1]河南农业大学烟草学院,郑州450002 [2]河南省烟草公司许昌分公司,河南许昌461000

出　　处：《应用生态学报》2015年第11期3367-3372,共6页Chinese Journal of Applied Ecology

基　　金：河南省烟草公司科技项目(HYKJZD201401)资助

摘　　要：以富钾植物烟草为研究对象,烤烟基因型ND202、NC628、G28、NC628×ND202为材料,分析了不同基因型间根系特性及其对矿物钾活化能力的影响差异.结果表明:根系对矿物钾活化总量越高,烤烟的钾积累量越高.ND202根系发达,富钾能力强,但受环境中钾含量影响较大;NC628根系矿钾活化能力较强,能够显著提高根际土壤钾有效性,但富钾能力较弱;杂交种NC628×ND202较母本具有较高的矿钾活化能力及耐低钾能力,较父本有较高的干物质积累量及富钾能力.因此,利用杂交培育高钾品种是有效的,选育高钾品种时,亲本不仅应具有较高的配合力,更应优先考虑其能否提高根际土壤钾的有效性.Tabacco（ Nicotiana tabacum） has a relatively high requirement for potassium（ K）. The difference in root characteristics and ability to release K from minerals of flue-cured tobacco in four genotypes ND202,NC628,G28 and NC628 × ND202 were analyzed. The results showed that the more available K released from minerals by roots,the more K would be accumulated by plants.ND202,which was K-enriched genotype,had well developed root system and was easily influenced by K content in the environment. Compared with ND202,NC628 significantly enhanced the effectiveness of K in substrate by releasing K from minerals,though the ability to absorb K was weak.Moreover,the hybrid of NC628×ND202 had a higher ability to release K and to tolerate low-level K than maternal parent. It was higher in dry matter accumulation and K enrichment than male parent.So hybridization had the utility value in high-K variety cultivation. These results provided evidence that parents should have the ability to enhance available K from soil besides the high combining ability for breeding the high-K variety.

关 键 词：根系特性 矿物钾活化量 植物高钾机理 

分 类 号：S572[农业科学—烟草工业]