机插方式和密度对水稻主要品质性状及淀粉RVA谱特征的影响  

Effect of different mechanical transplanted methods and plant density on grain quality and characteristic of starch RVA of rice

作　　者：胡雅杰 吴培 邢志鹏 钱海军 张洪程 戴其根 霍中洋 许轲 魏海燕 郭保卫 

机构地区：[1]扬州大学农业部长江流域稻作技术创新中心/江苏省作物遗传生理重点实验室培育点/江苏省粮食作物现代产业技术协同创新中心,江苏扬州225009

出　　处：《扬州大学学报（农业与生命科学版）》2017年第3期73-82,共10页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：国家重点研发计划项目(2016YFD0300503);江苏省农业科技自主创新项目(CX[2]1003.9);江苏省高校优势学科建设工程项目(2014-11)

摘　　要：以3种不同穗型品种为试材,设置钵苗机插(行距33cm,A)、毯苗机插(行距30cm,B)、毯苗机插(行距25cm,C)3种机插方式,并在不同机插方式下设置不同株距,研究不同机插方式水稻主要品质性状和淀粉RVA谱特征值对密度的响应特征。结果表明:随密度降低,不同机插方式下不同穗型水稻品种加工品质提高,而垩白度、垩白率、直链淀粉含量和蛋白质含量呈递减而胶稠度有变长趋势。同一密度下,与毯苗机插相比,钵苗机插加工品质有所提高,垩白度、垩白率、直链淀粉含量和蛋白质含量较低,胶稠度较长。对淀粉RVA谱分析表明,随密度降低,大穗型品种3种机插方式下峰值黏度和崩解值呈递增,消减值呈递减;中穗型品种A、B方式峰值黏度和崩解值呈先增后减,C方式峰值黏度呈递增;A、B方式消减值呈先减后增,C方式呈减少趋势;小穗型品种3种机插方式峰值黏度和崩解值呈先增后减,消减值呈先减后增。同一密度下,与毯苗机插相比,钵苗机插峰值黏度和崩解值较高,消减值较低。This study was to evaluate the effects of different mechanically transplanted methods and plant densities on grain quality and starch RVA. Three panicle typed rice cultivars were field-grown. We compared three mechanically transplanted methods including mechanically transplanted pot seedling （A）, mechanically transplanted carpeted seedling in row spacing of 30 cm （I3）, mechanically transplanted carpeted seedling in row spacing of 25 cm （C）, and set different plant density in A, B, C methods. With plant density decreased, milling quality was improved for different panicle typed rice in different mechanically transplanted methods chalky grain rate, chalkiness degree, amylose content and protein con- tent of three panicle typed rice cultivar showed decline trend, but it was opposite in gel consistency. In the same plant density, compared to those of mechanically transplanted carpet seedlings （CS）, brown rice rate, milling quality of me- chanically transplanted pot seedling （PS） increased, but chalky grain rate, chalkiness degree, amylose content and protein content decreased, there was no difference between B and C method. The results of starch RVA were analyzed, peak vis- cosity and breakdown increased and setback decreased in different mechanically transplanted method for LPT with plantdensity decreased. For MPT, with plant density decreased, peak viscosity and breakdown increased and then decreased in A and B method, but those of C method increased, setback decreased and then increased in A and 13 method, those of C method showed decline. For SPT, with plant density decreased, peak viscosity and breakdown increased and then de- creased in A, B and C method, but setback decreased and then increased. In the same plant density, PS had greater peak viscosity and breakdown and lower setback than those of CS.

关 键 词：水稻 机插方式 密度 稻米品质 RVA谱特征 

分 类 号：S511[农业科学—作物学]