水稲玄米の無機質組成におよぼす幼穂形成期以後における土壌水分の影響

抄録

Investigations have been carried out to determine the influence of soil moisture, i. e. pF: 0, 1.5, 2.2 and 2.7, after young panicle formation stage on the phosphorus, potassium, magnesium, manganese and iron contents in lowland brown rice of two varieties. The results indicated that all the components were influenced by the soil moisture conditions. The phosphorus, potassium, magnesium and manganese contents on dry matter basis decreased with decreasing the soil moisture. In regard to the composition in ash with decreasing the soil moisture, the phosphorus and manganese contents decreased and the iron content increased, whereas the magnesium content decreased after increasing. The most affected component was manganese both on dry matter basis and in ash. The second was potassium on dry matter basis and was iron in ash.