作物学报 ›› 2010, Vol. 36 ›› Issue (2): 285-295.doi: 10.3724/SP.J.1006.2010.00276
张自常,孙小淋,陈婷婷,刘立军,杨建昌*
ZHANG Zi-Chang,SUN Xiao-Lin,CHEN Ting-Ting,LIU Li-Jun,YANG Jian-Chang
摘要:
以超级稻武粳15 (粳稻)和两优培九(籼稻)为材料,从移栽至成熟进行覆膜旱种(PM)、覆草旱种(SM)和裸地旱种(NM)处理,以水种(TF)为对照。结果表明,与TF相比,旱种水稻产量都有不同程度的降低,NM、PM和SM的减产率分别为38.7%~46.5%,9.8%~17.4%和1.7%~7.0%,NM和PM的产量与TF有显著差异,SM的产量与TF差异不显著。SM改善了稻米的加工品质、外观品质和蒸煮品质,NM和PM则降低了稻米这些品质;SM还提高了稻米的最高黏度和崩解值,降低了消减值,NM和PM的结果则相反。两品种的结果趋势一致。SM提高了灌浆期的根系氧化力、叶片光合速率和籽粒中蔗糖-淀粉代谢途径关键酶活性,NM和PM则降低了上述生理指标值。在SM条件下,结实期较高的根系活力、叶片光合速率和籽粒中蔗糖-淀粉代谢途径关键酶活性是获取较高产量和较好稻米品质的重要生理原因。
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