CAJ | 학술논문

几种甘蓝型油菜幼苗抗旱性特征的比较研究
궤충감람형유채유묘항한성특정적비교연구
Comparative study on drought resistance characteristic of Brassica napus L .seedling

万方数据

干旱地区农业研究榦旱地區農業研究 간한지구농업연구
AGRICULTURAL RESEARCH IN THE ARID AREAS
2014年 5期 46-51 ,共6页

关周博%田建华%胡银岗%李少钦%董育红%郑磊%韦世豪%塔娜%王学芳%张文学%李殿荣

관주박%전건화%호은강%리소흠%동육홍%정뢰%위세호%탑나%왕학방%장문학%리전영

甘蓝型油菜%幼苗%抗旱性甘藍型油菜%幼苗%抗旱性
감람형유채%유묘%항한성
Brassica napus L .%seedling%drought resistance

以EV1、EV2、EV3、EV4、EV5、EV66个抗旱性不同的油菜品种为试验材料，通过不同浓度PEG-6000渗透溶液模拟干旱胁迫处理，研究油菜幼苗的抗旱指数、根长、苗高和根冠比等性状变化，探索在大田环境条件下的苗期生长特征。结果表明，水分胁迫下EV2的抗旱指数最大，EV6的抗旱指数最小；不同浓度PEG胁迫下，各品种差异显著，EV1、EV2、和EV3的根长、苗高和根冠比较大，而EV5和EV6的表现较差。在大田油菜五叶期时，EV2的冠层覆盖面积最大，与其它品种之间存在极显著性差异；总生物量以EV2、EV3和EV1较大，根系干重以EV2较大，而且三者之间存在显著相关性；与抗旱指数进行通径分析，冠层覆盖面积对抗旱性的直接通径系数最大，达到0．5975。冠层覆盖面积的大小反映了早期活力的强弱，早期活力强，相应的品种抗旱指数高，抗旱性强。
이EV1、EV2、EV3、EV4、EV5、EV66개항한성불동적유채품충위시험재료，통과불동농도PEG-6000삼투용액모의간한협박처리，연구유채유묘적항한지수、근장、묘고화근관비등성상변화，탐색재대전배경조건하적묘기생장특정。결과표명，수분협박하EV2적항한지수최대，EV6적항한지수최소；불동농도PEG협박하，각품충차이현저，EV1、EV2、화EV3적근장、묘고화근관비교대，이EV5화EV6적표현교차。재대전유채오협기시，EV2적관층복개면적최대，여기타품충지간존재겁현저성차이；총생물량이EV2、EV3화EV1교대，근계간중이EV2교대，이차삼자지간존재현저상관성；여항한지수진행통경분석，관층복개면적대항한성적직접통경계수최대，체도0．5975。관층복개면적적대소반영료조기활력적강약，조기활력강，상응적품충항한지수고，항한성강。
An experiment was conducted to investigate drought index,root length,seeding height and the ratio of root to shoot of 6 rapeseed cultivars (EV1,EV2,EV3,EV4,EV5,EV6)with different drought resistance under differ-ent concentrations of PEG-6000 osmotic solution simulated drought in field .The result showed that drought index of EV2 was the highest,while EV6 was the lowest under water stress .There were significant differences among cultivars un-der different concentration of PEG,that root length,with seeding height and ratio of root to shoot of EV1,EV2 and EV3 being larger than those of EV5 and EV6 .Canopy cover area of EV2 was the larger as compared with other cultivars dur-ing five-leaf stage .Path analysis of drought resistance index showed that direct path coefficient of canopy cover area to drought resistance was as high as 0 .5975 .Canopy cover area reflected strength of vigor during early stage at early stage when the drought resistance index of cultivars and drought resistance being stronge .