Yield and growth characteristics of erect panicle type rice (Oryza sativa L.) cultivar, Shennong265 under various crop management practices in Western Japan
Yield and growth characteristics of erect panicle type rice (Oryza sativa L.) cultivar, Shennong265 under various crop management practices in Western Japan
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DOI：
10.1080/1343943x.2018.1426993
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发表时间：
2018-01-01
影响因子：
2.5
通讯作者：
Tang, Liang
中科院分区：
文献类型：
--
作者：
Hirooka, Yoshihiro;Homma, Koki;Tang, Liang
直立穗型水稻能有效利用光能，改善生态生长条件。在这些品种中，沈农265已在中国北方各地种植成功。然而，还没有研究探讨作物干物质生产力之间的关系，天气条件，并在日本直立穗型水稻品种的氮吸收。本研究的目的是评估直立穗型水稻沈农265在不同条件下在日本西部的生产力。三个水稻品种，神农265，日本晴，高成在不同的肥料和种植密度条件下，在日本西部的领域，利用这些信息，我们比较了产量和生长特性的神农265与日本晴和高成。尽管沈农265的辐射利用效率与高产品种（Takanari）相似，叶片氮含量远高于Takanari和日本晴，但在正常施肥和种植密度条件下，沈农265的平均籽粒产量约为6.9 t ha（-1），而日本晴为6.2 t ha（-1），Takanari为9.6 t ha（-1）。这些结果表明，虽然沈农265具有较高的产量潜力，但本研究提供的环境条件，包括气候，肥料和种植期不适合实现其最大产量。沈农265的减产可能与抽穗后施肥不足、生育期短以及西日本的气候有关。在日本西部地区，为了获得较高的产量，可能需要在抽穗期增施肥料和提早移栽。
Erect panicle rice cultivars utilize solar energy effectively and have improved ecological growing conditions. Among such cultivars, Shennong265 has been grown successfully throughout Northern China. Nevertheless, no studies have yet examined the relationships between crop dry matter productivity, weather conditions, and nitrogen uptake of the erect panicle type rice cultivar in Japan. The objective of our study was to evaluate the productivity of erect panicle rice Shennong265 in Western Japan under varied conditions. Three rice cultivars, Shennong265, Nipponbare, and Takanari were grown in the field under different fertilizer and plant density conditions in Western Japan; using this information, we compared yield and growth characteristics of Shennong265 with those of Nipponbare and Takanari. Although Shennong265 had radiation use efficiency similar to that of the high yielding cultivar (Takanari) and much higher leaf nitrogen content than Takanari and Nipponbare, the average grain yield of Shennong265 grown under normal fertilizer and plant density conditions was approximately 6.9 t ha(-1) as against 6.2 t ha(-1) for Nipponbare and 9.6 t ha-1 for Takanari. These results suggest that, while Shennong265 has a high yield potential, the environmental conditions including climate, fertilizer, and planting period provided in this study were not suitable for achieving its maximum yield. The reduced performance of Shennong265 may be caused by insufficient fertilizer after heading and by shorter growth periods, as well as by the climate of Western Japan. Additional fertilizer application during the heading stage and earlier transplanting may be needed to obtain higher Shennong265 yields in Western Japan.