异地栽培对湖北地方优质稻光合生理和稻米品质的影响

为了研究栽植地域变化对太子稻光合特性和稻米品质的影响,在太子米主产区和对照地区进行了异地栽培试验.结果表明:在不同栽植地域,太子稻光合作用的环境条件[如光量子(PAR)、CO2浓度、气温(Ta)和叶片温度(T1]有极显著差异.异地栽培对剑叶面积、叶绿素a、叶绿素b含量和净光合速率(Pn)的影响达到极显著水平;对剑叶细胞问CO2浓度(Ci)的影响也达到极显著水平.同时,不同栽植地域生产的太子米加工品质、外观品质和蒸煮品质均有极显著的差异.太子稻在主产区栽植稻米米质优良,在主产区外种植米质变劣;但对照品种在太子稻主产区种植米质得到改善.相关分析表明,太子米品质指标间有复杂的相关关系,其中糙米率与精米率、整精米率与米长/宽比呈极显著正相关;整精米率与延伸率呈极显著负相关;米长/宽与延伸率也呈极显著负相关.在灌浆期,太子稻剑叶光合特性指标和稻米品质指标问相关关系不显著;光合环境指标中,大气CO2浓度与垩白粒率呈显著正相关,与糊化温度呈显著负相关.其它环境指标与太子米品质指标相关不显著.

Influences of Planting Taizi Paddy(indica) in Other Areas on Its Photosynthetic Characteristics and Rice Quality

Taizi rice is an excellent local rice in Hubei Province. The cultivars of Taizi paddy including some native ones and some excellent ones were introduced and have been cultivated in the main production regions of Taizi rice for a long time.The cultivation trials were conducted on the main production regions of Taizi rice and control region to understand the influences of the different planting regions on photosynthetic characteristics and rice quality.The results showed that there were remarkable differences...