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D优3138是信阳市农业科学院2014年选育成功的优质高产三系杂交籼稻组合,为充分发挥其高产、优质特性,促进其在生产上的推广应用,实现杂交水稻生产上的新老品种更替。研究不同施氮量(120kg/hm~2、180kg/hm~2和240kg/hm~2)对D优3138干物质的积累、运转及稻米品质的影响。结果表明:相同生育时期的叶面积指数和叶绿素含量随施氮量的增加而增大;施氮量180~240kg/hm~2时,稻米加工品质、蒸煮品质和营养品质较高。兼顾水稻高产及品质优良的特点,豫南稻区种植D优3138适宜的施氮量为180~240kg/hm~2。
D You 3138 is a combination of good quality and high yield three-line indica hybrid rice selected by Xinyang Academy of Agricultural Sciences in 2014. In order to give full play to its high yield and high quality characteristics, promote its popularization and application in production and realize the replacement of new and old varieties in hybrid rice production . The effects of nitrogen application rates (120kg / hm ~ 2,180kg / hm ~ 2 and 240kg / hm ~ 2) on the accumulation and operation of dry matter of D You 3138 and the quality of rice were studied. The results showed that the leaf area index and chlorophyll content of the same growth stage increased with the increase of nitrogen application rate. When the nitrogen application rate was 180 ~ 240 kg / hm ~ 2, the processing quality, cooking quality and nutritional quality of rice were higher. Considering the characteristics of high yield and good quality of rice, suitable nitrogen application rate for planting D You 3138 in southern Henan was 180 ~ 240kg / hm ~ 2.