Effect of non-flooded cultivation patterns for the seedling-raising and -transplanting of rice on grain quality and its relations with the concentrations of hormones in grains

• Published in: Chung-kuo nung yeh kʿo hsüeh Vol. 41; no. 5
• Main Authors: Zhang Zichang, Duan Hua, Yang Linian
• Format: Journal Article
• Language: Chinese
• Published: 01.05.2008
• Subjects: GRAIN; GRANOS; HORMONAS; HORMONE; HORMONES; http://www.fao.org/aos/agrovoc#c_3346; http://www.fao.org/aos/agrovoc#c_3663; http://www.fao.org/aos/agrovoc#c_5438; http://www.fao.org/aos/agrovoc#c_7873; ORYZA SATIVA; REPIQUAGE; TRANSPLANTING; TRASPLANTE
• ISSN: 0578-1752

探讨育苗移栽水稻在不同旱种方式下米质形成的特点及其与籽粒激素浓度的关系。试验以镇稻88（粳稻）和扬稻6号（籼稻）为材料，进行无覆盖旱种（裸种，BN）、地膜覆盖旱种（PM）和麦秸秆覆盖旱种（SM）处理，以常规水种（TF）为对照。与TF相比，BN和PM显著降低了产量，SM的产量与TF无显著差异。SM显著降低了垩白米率、垩白度和消减值，显著增加了胶稠度、碱消值和崩解值。BN和PM对上述稻米品质的影响与SM的相反。稻米直链淀粉含量和蛋白质含量在各处理间无显著差异。两品种表现一致。结实期籽粒吲哚-3-乙酸（IAA）、赤霉酸（GA1＋GA4）、玉米素（Z）＋玉米素核苷（ZR）浓度在灌浆早期处理间差异很小，在灌浆中、后期则表现为SM＞TF＞PM＞BN，乙烯释放速率则表现为BN＞PM＞TF＞SM。籽粒脱落酸（ABA）浓度在SM、PM和TF之间无显著差异。在各处理中，BN籽粒ABA浓度在灌浆前期最低，灌浆中后期则最高。灌浆中后期籽粒IAA和GA1＋GA4、灌浆前中期籽粒ABA及灌浆各期籽粒Z＋ZR浓度与粒重、出糙率、精米率和崩解值呈显著或极显著正相关（r=0.71*～0.96**），与消减值呈显著或极显著负相关(r=-0.76*～-0.91**)。灌浆后期籽粒IAA和Z＋ZR浓度与垩白粒率和垩白度呈显著或极显著负相关（r=-073*～-0.85**）。灌浆各期籽粒乙烯释放速率与粒重、出糙率、精米率、碱消值和崩解值呈显著或极显著负相关（r=-0.71*～-0.91**），与垩白粒率、垩白度和消减值呈显著或极显著正相关（r=0.73*～0.93**）。覆草旱种可以改善稻米品质，裸地旱种和覆膜旱种则使品质变差；促进型激素浓度的降低和乙烯产生的增加是裸地旱种和覆膜旱种稻米加工品质和外观品质较差的重要原因。 The purpose of this study was to investigate the grain quality under different non-flooded cultivations for seedling-raising and -transplanting rice and its relationship with the concentrations of hormones in grains during grain filling. Two rice cultivars, Zhendao 88 (j