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首页> 外文期刊>日本作物學會紀事 >Crop-Scientific Studies on Yield-Forecast of Lowland Rice (Preliminary report) : X. On Forecast of the Weight of 1, 000 Rice-Kernels (1)
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Crop-Scientific Studies on Yield-Forecast of Lowland Rice (Preliminary report) : X. On Forecast of the Weight of 1, 000 Rice-Kernels (1)

机译：作物科学研究对低地稻米产量预测（初步报告）：X.关于1,000米 - 内核的重量预测（1）

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(X) On forecast of the weight of 1, 000 rice-kernels. In the former report it has been made clear that weight of 1, 000 rice-kernels is determined primarily by the size of lemma and palea, and secondarily by the development of caryopsis filling up the inside of them, and, moreover, the former depend upon the environmental condition during the period prior to heading and the latter upon that after heading. Basing upon these facts, the authors have made some experiments to find out the methods for forecasting the weight of l, 000 rice-kernels. The rsults are summarized as follows: (1) As number of spikelets per head is greatly influenced by the environmental condition in the period prior to heading, weight of l, OOO kernels can be forecast roughly from the number of spikelets per head. The method is available in early stage, but its goodness of fit is not so high as the other methods. (2) Where the environmental condition in the period after heading is normal, there are found high correlation coefficients between weight of hulls and that of rice-kernels at the time of maturity, and, moreover, between weight of hulls at the time of maturity and that of hulls at the 7th day after heading. Therefore, where the environmental condition in the period after heading is normal, it will likely be possible to forecast the weight of 1, OOO rice-kernels from the weight of hulls at heading-time. (3) Whenever specific gravity of gains reaches to a certain value (the value is about 1.05, excluding grains lighter than 0.84 in specific gravity), final weight of 1, 000 rice-kernels can be forecast from the weight of developing caryopsis, irrespective of varieties, cultivating methods and stages subjected to cutting treatment of leaf-blades. Especially, it can be clearly forecast from the weight of developing caryopsis at the time when the rate of increase in specific gravity of grains begins to decrease, after reaching to its maximum rate. The period in which weight of 1, 000 rice-kernels can be forecast, so far as this present experiments are concerned, is at about 17th day for early maturing variety, 22-27th day for medium and late variety after heading.
机译：（x）预测1,000米 - 内核的重量。在前面的报告中，已经明确表示，重量为1，000米 - 内核主要由引理和掌心的大小决定，并通过Caryopsis的发展填补了他们的内部，而且，前者依赖在期间和后者之前的期间的环境状况上。基于这些事实，作者对一些实验进行了一些实验，以找出预测L，000米核的重量的方法。 RSULTS总结如下：（1）由于每头钟的每头钟的尖峰数大大影响，Li重量的环境状况，可以大致从每头钟的尖峰数预测ooo内核。该方法在早期阶段提供，但其良好的良好并不像其他方法那么高。 （2）在展览期间的环境条件正常的情况下，在成熟时壳体的重量和水稻 - 仁的重量之间发现了高相关系数，而且在成熟时的船体重量之间和船体在第7天开始。因此，在出头后期的环境条件是正常的情况下，可能会在航线上的船体重量中预测1，OOO米粒的重量。 （3）无论如何，每当收益的比重达到一定值（值约为1.05，不包括在比重中比0.84较轻的晶粒），无论均线如何，都可以预测最终重量为1，000米 - 核，而不管怎样叶片切割处理的品种，培养方法和阶段。特别是，在达到其最大速率之后，可以清楚地预测在谷物的比重增加到减少的时间的增加。可以预测重量为1,000米 - 核的时期，因此在本实验所关注的情况下，在预期成熟品种的大约第17天，在前后的中期和晚期的早期成熟品种。

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