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首页> 外文期刊>日本作物學會紀事 >Stduies on the Dry Matter Production of Sweet Potato : XI. The effect of deep placement of mineral nutrient on the tuber-yield of sweet potato
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Stduies on the Dry Matter Production of Sweet Potato : XI. The effect of deep placement of mineral nutrient on the tuber-yield of sweet potato

机译：红薯干物质生产研究：XI。矿质营养深度放置对甘薯柚木产量的影响

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摘要

There is a intimate corelation between the absorption amount of potassium and tuber-yield of sweet potato in wide range. However, it had been vain attempted to increase the dosage of potassium application with ordinary procedure for get a very high yield. Then we carried out various experiments on the application method of potassium. In the investigation of root system of the sweet potato, a interesting fact was found out that the roots occurrenced from the stem were located in a shallow soil layer near of surface, but the roots developed from the tauber were located in deep soil layer. Another fact also recognized that abundantly potassium exist in deep soil layer at high-yield-field of sweet potato. Consequently, mineral nutrients were applicated the both layers, shallow and deep, through the plowing before planting. We got a conclusion as a follows; it is very effective in order to tuber-yield increasing to applicate the potassium in deep soil layer, 30 cm or 40 cm depth, at fertile soil, and it is desirable to applicate with together potassium, nitrogen and phosphorus at arid field.
机译：在宽范围内甘薯的吸收量与甘薯的吸收量之间存在紧密系列。然而，它已经徒劳无功地增加钾应用的剂量，以普通程序获得非常高的产量。然后我们对钾的应用方法进行了各种实验。在对甘薯根系的调查中，发现了一种有趣的事实，即从茎干发生的根部位于表面附近的浅层土层中，但从陶工中发育的根部位于深土层中。另一个事实还认识到，甘薯高收益域的深层土壤中存在丰富的钾。因此，通过在种植前通过犁施加矿物营养素，浅浅，深。我们得出结论如下;为了将肺部产量增加，在肥沃的土壤中涂在深土层，30厘米或40cm深度的钾盐，钾盐，在肥沃的土壤中粘合，这是非常有效的，并且希望在干旱场上与钾，氮和磷一起使用。

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