土壤類型別 三要素 및 粘土鑛物의 全量全層 施用이 水稻生育 및 收量에 미치는 影響
The Effect of Whole Layer Placement of Total Amount of N.P.K Application with Clay Minerals on the Growth and the Yield of Paddy Rice in Different Soil Types 토양유형별 삼요소 및 점토광물의 전량전층 시용이 수도생육 및 수량에 미치는 영향
This study was carried out to evaluate the effects of whole layer placement of total of N.P.K. application with clay mineral such as Bentonits and Zeolite on the growth and the yield of rice in different sandy soils. The results obtained were as follows ; The yield was increased by whole layer placement of total amount of N.P.K. application with clay minerals in both soils examined compared with the treatment of N.P.K. only. In fine sandy loam soil, it was increased significantly at 5% level at N.P.K. + Zeolite 1.0 M/T and in fine sandy soil, at 5 % and 1 % at N.P.K. + Bentonits 0.5 M/T and N.P.K. + Bentonite 1.0 M/T, respectively. The nitrogen and silica content of rice straw at heading stage were increased and were tended to increase in phosphate and exchangeable cations such as potassium. calcium and magnesium by whole layer placement of total amount of N.P.K. application with clay mineral. The chemical properties of both soils were changed slightly after the harvest of rice by the whole layer placement of total amount of N.P.K. application with clay mineral ; pH, C.E.C., exchangeable base and available silica content were increased.