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首页> 外文期刊>日本作物學會紀事 >Studies on Ripening of Rice Varieties Grown under Low Temperature : I. Varietal differences in weather-dependent characteristics of ripening
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Studies on Ripening of Rice Varieties Grown under Low Temperature : I. Varietal differences in weather-dependent characteristics of ripening

机译：低温生长的水稻品种的熟化研究：I。依赖于熟发的渐份性特征的变异差异

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In this paper, the varietal differences in the weather-dependent characteristics of ripening were analized for the data taken during 12 years from 1973 to 1984 at Hokkaido Prefectural Kitami Agricultural Experiment Station. The main results are summarized as follows: 1. The significant multiple correlation coefficients of ln (1-percentage of ripening grains, R) with the number of grains per square meter (N), mean temperature for 25 days before the heading date (TI) and mean temperature for 40 days after the heading date (T2) were obtained in all varieties (Table 1). Therefore, the relation between R and these 3 factors for "Onnemochi" was shown by the next formula; R=1-39.23 exp (0.3447N-0.1454T1-0.1524T2 ) The relation for "Hayakogane" was shown by the next formula; R=1-2.05 exp (0.3727N-0.027T1-0.1321T2) 2. The contribution ratios of N, T1 and T2 to R differed between varieties (Fig. 2 ). It was presumed that the contribution ratio of N was associated with the plant type and the efficiency for dry matter production. The contribution ratio of T1 was correlated with the average value of fertility percent, and that of T2 was correlated with the average value of heading date. 3. By using the above formula, the optimum number of grains to obtain the highest yield was estimated (Fig. 3). It was more than 40, 000 grains/m2 under high temperature, but less than 30, 000 grins/m2 under low temperature. From the these results, it could be concluded that the sufficient number of grains for the stable rice culture were approximate 35, 000 grains/m2 in Abashiri District. 4. The suitable heading time was earlier about 1 week as compared with the average value of heading date in all varieties (Fig. 5). This may suggest that the qualitative improvement of seedling was very important to hasten the heading and to improve the percentage of ripening grains.
机译：本文在1973年至1984年在北海道县九氮农业实验站的1973年至1984年期间，分析了依赖于1973年的数据的天气依赖性特征的变异差异。主要结果如下概述：1。LN的显着多相关系数（成熟颗粒的1百分比，R），每平方米（n）的晶粒数，平均温度为标题日期前25天（Ti） ）在所有品种中获得标题日期（T2）后40天的平均温度（表1）。因此，下排公式显示了R和“Onnemochi”之间的关系与“Onnemochi”之间的关系; r = 1-39.23 exp（0.3447n-0.1454t1-0.1524t2）下一个公式显示“hayakogane”的关系; r = 1-2.05 exp（0.3727N-0.027T1-0.1321T2）2。N，T1和T2至R的贡献比在品种之间有所不同（图2）。推测，N的贡献比与植物类型和干物质生产效率有关。 T1的贡献比与生育率的平均值相关，T2的平均值与标题日期的平均值相关。 3.通过使用上述公式，估计了获得最高产率的最佳数量（图3）。它在高温下大于40,000粒/ m2，但低温下少于30,000颗粒/ m2。从这些结果来看，可以得出结论，稳定水稻培养物的足够数量的谷物近似35，000粒/ M2在阿巴什里区。 4.与所有品种中标题日期的平均值相比，合适的航线时间早于1周（图5）。这可能表明，幼苗的定性改善对于加速标题并提高成熟颗粒的百分比非常重要。

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