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首页> 外文期刊>日本作物學會紀事 >Studies on the Dry-Matter Production of the Sweet Potato : Aspect of dry matter production on the field
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Studies on the Dry-Matter Production of the Sweet Potato : Aspect of dry matter production on the field

机译：甘薯干物质生产的研究：田间干物质生产方面

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The present studies reported in this paper were made in an effort to make clear the basic facts of dry matter production in sweet potato under field conditions. Sweet potato, variety Norin No. 1, was grown on a feild at 1961 with different fertility levels, planting dates and planting densities. Dry matter increasing was measured at intervals of 3 weeks over all growing course. Maximum rate of dry matter increase per unit field area showed 120 g/m2 field/week which existed at middle stage of growth. Maximum values of net assimilation rate and leaf area index were 55 g/m2 leaf area/week and 4.3 m2/m2 field, respectively. Optimum leaf area index of sweet potato on field for the dry matter production was 3.2 on solar radiation 380 g.cal/cm2/day at middle growing stage, from July 17 to Sept. 18. When leaf area index became all excess, it had an unfavourable effect on the dry matter production due to lack of light intensity in community, moreover, stems weight/leaves weight ratio tend to increase. Increasing of this ratio was considered to be disadvantage for the net assimilation rate owing to rising the respiratory consumption in non-productive parts. Table 1. Total dry weight and tuberous rots weight at harvesting time. [table] Note. 1). Harvesting time…Early planting: Oct. 10. Late planting: Oct. 31. 2). Abbreviation……P: poor soil. F: fertile soil. D: dense planting. T: thin planting. 3). T is same as in Fig. 9.
机译：本文报告的目前的研究是为了清楚的是在现场条件下清楚红薯干物质生产的基本事实。甘薯，品种诺林第1号，在1961年的一架育儿上生长，具有不同的生育水平，种植日期和种植密度。在所有生长过程中以3周的间隔测量干物质增加。每单位田间区域的最大干物质增加率显示在生长中期存在的120g / m 2场/周。净同化率和叶面积指数的最大值分别为55克/平方米/周和4.3m2 / m2场。干物质生产领域甘薯最佳叶面积指数为380 G.Cal/CM2/DAD在中间生长阶段的3.2，从7月17日至9月18日。当叶面积指数变得过剩时，它有此外，由于群落中缺乏光强度，对干物质产生的不利影响，茎重量/叶重量比趋于增加。由于在非生产零件中升高呼吸消耗，因此认为这种比例的增加被认为是净同化率的缺点。表1.收获时间的总干重和结节轨道重量。 [表]注意。 1）。收获时间......早期种植：10月10.晚上种植：10月31日.2）。缩写...... P：贫瘠的土壤。 F：肥沃的土壤。 D：致密种植。 T：薄种植。 3）。 T与图1中的相同。9。

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