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靳晓春,夏永伟,蒋佰福,等.玉米果穗乳熟期水分运动变化[J].中国农学通报,2019,35(26):13-18.,et al.Moisture Change of Maize Ear at Milk Stage[J].Chinese Agricultural Science Bulletin,2019,35(26):13-18
玉米果穗乳熟期水分运动变化
Moisture Change of Maize Ear at Milk Stage
投稿时间:2018-05-18  修订日期:2019-08-14
DOI:10.11924/j.issn.1000-6850.casb18050099
中文关键词: 玉米  乳熟期  果穗  含水量  脱水率
英文关键词: maize  milk stage  ear  moisture content  moisture change
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基金项目:国家重点研发计划项目课题(2018YFD0300103);主要农作物种质资源创新与规模化制繁种技术研究(GA18B101);黑龙江省农业科学院基 金“三江平原地区玉米耐冷害耐密植种质资源的创新与利用”。
作者单位E-mail
靳晓春 黑龙江省农业科学院佳木斯分院 jinxiaochun315@126.com 
夏永伟 黑龙江省农业科学院佳木斯分院 jinxiaochun315@126.com 
蒋佰福 黑龙江省农业科学院佳木斯分院 jinxiaochun315@126.com 
牛忠林 黑龙江省农业科学院佳木斯分院 jinxiaochun315@126.com 
邱磊 黑龙江省农业科学院佳木斯分院 jinxiaochun315@126.com 
吴丽丽 黑龙江省农业科学院佳木斯分院 jinxiaochun315@126.com 
王庆胜 黑龙江省农业科学院佳木斯分院 jinxiaochun315@126.com 
中文摘要:
      旨在明确玉米果穗乳熟期穗轴、籽粒、苞叶、穗柄水分运动变化。本文利用生育期一致,乳熟期籽粒脱水速率差异的品种‘先玉696’、‘合玉29’为供试材料,采用烘干减重法(《ISTA水分测定手册》2007)测定乳熟期穗轴、苞叶和籽粒含水量与不同时期变化量与吸湿法测定穗柄中水分运动,结果显示不同脱水类型品种玉米穗轴、苞叶和籽粒展现出相同的趋势苞叶>籽粒>穗轴,先玉696快于合玉29。脱水快品种先玉696表现出随着生育期推移茎秆向果穗输水逐渐下降,苞叶含水量前期快速降低,籽粒含水量下降较快。脱水慢品种合玉29茎秆向果穗输水量高于先玉696并且输水量没有发生变化,苞叶水分降低缓慢,籽粒含水量下降缓慢。本研究也显示籽粒脱水与苞叶、穗轴的脱水速率密切相关。籽粒生理成熟后自然脱水过程中水分并没有由果穗向茎秆转移,茎秆对果穗脱水起负效应,但不同品种输水量和变化量不同(差异不显著)。
英文摘要:
      The objective is to explore the moisture change of ear cob, kernel, bract and ear stem of maize at milk stage.‘Xianyu696’and‘Heyu29’with the same growth period and different kernel dehydration rates at milk stage were used as materials. The moisture contents of ear cob, bract and kernel at milk stage were detected with drying weight reduction method, the change contents at different stages were also determined. The moisture change in ear stem was detected with moisture absorption method. The results showed that the dehydration rate of different varieties had the same trend: bract>kernel>cob,‘Xianyu696’>‘Heyu29’. ‘Xianyu696’(the fast dehydration) showed that water traffic volume gradually decreased from stalk to ear along with the growth period going on. The moisture content of bract decreased quickly at the earlier stage, and the moisture content of kernel decreased quickly.‘Heyu29’(the slow dehydration) showed that water traffic volume was higher than that of‘Xianyu696’from stalk to ear, the carrying capacity did not change. The moisture of bract and kernel decreased slowly. We also found that kernel dehydration was related to the dehydration rate of bract and ear stem. After the physiological maturity of kernels, the water did not flow from ear to stalk in the natural dehydration process. The carrying capacity and variation of different varieties were different (the difference was not significant).
作者简介:
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