Ecological Studies of Heading of Rice. : I. Relations between the days from seeding to heading and several conditions. : II. The "basic vegetative growing habit", "sensibility to day-length", and "sensibility to temperature", of Japanese rice.
Ecological Studies of Heading of Rice. : I. Relations between the days from seeding to heading and several conditions. : II. The "basic vegetative growing habit", "sensibility to day-length", and "sensibility to temperature", of Japanese rice.
复制标题
水稻抽穗的生态研究。
DOI：
10.1626/jcs.27.61
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发表时间：
1958
影响因子：
--
通讯作者：
S. Asakuma
中科院分区：
文献类型：
--
作者：
S. Asakuma
1）早熟（3月下旬至8月中旬）和晚熟（7月中旬至10月下旬），早、晚品种的留苗床“播种至抽穗天数（D.H.）”与稀播或密播相同，但密播时出叶速度延缓或叶数减少。另一方面，所谓的短日照品种在早熟和晚熟时都在相对较长的日照长度（13～14小时）下区分幼穗。由这些结果可以想象，水稻在自然日长下的D.H.主要受温度的影响，当温度的影响达到一定程度时，就会发生抽穗，因而涉及到“积温(A.T.)”。 2)各品种从播种至抽穗的(A.T.)早熟均大于晚熟。从以上的结果来看，“无效温度（x）”和“有效温度（y）的数量”的想法是值得注意的。根据这些想法，作者计算出 (x) 和 (y) 如下。 (D.H)=y/日平均气温-x…………(1) y={(A.T.)早熟}-{(D.H.)早熟}×(x)…………(2) y={A. T.) 晚熟}-{(D. H.) 晚熟}×(x)…………(3) 由这些计算得出的数据表明，早熟品种的 (x) 小于晚熟品种，并且 (y) 因品种而异。 3）此外，从其他结果也可以推测超最高温度的存在。
1) Both in the early (from late March to middle of August) and the late cropping (from middle of July to late October), the "number of days from seeding to heading (D. H.)" of the seedlings detained in the nursery bed including the early and late varieties were same with the thin or dense seeding despite of the delay of the speed of leaf appearing or the diminishing of the numbers of leaves in the dense seeding. On the other hand the so-called short-day varieties differentiated the young ears under the comparatively long day-length (13∼14 hours) both in the early and late croppings. From these results it is conceivable that the (D. H.) of rice under the natural day-length is mainly affected by temperature and that when the effects of temperature are amounted to some definites the heading is taken place, so that the "accumulated temperature (A. T.)" is concerned. 2) The (A. T.) from seeding to heading was larger in the early cropping than in the late cropping in all varieties. From this ahd the results of above, the ideas of the "uneffective temperature (x)" and the "quantity of the effective temperature (y)" are notable. From these ideas the author calculated (x) and (y) as follows. (D. H)=y/Average temperature of everyday-x………(1) y={(A. T.) in the early cropping}-{(D. H.) in the early cropping}×(x)…………(2) y={A. T.) in the late cropping}-{(D. H.) in the late cropping}×(x)…………(3) The data from these calculations reveal that the (x) is smaller in the early varieties than the late varieties and the (y) is varied according to the varieties. 3) Moreover the existence of the supra-maximum temperature was conceivable from other results.