矽對水稻之效應(第三報)

Abstract

水稻田間栽培試驗結果知含矽鑛滓之施用可提高單位面積內稻谷產量。其增產程度雖依試驗地點而有差異，由於土壤中可溶性矽含量與稻谷增產百分率間，及第一期作水稻收穫時藁稈中矽含量與稻谷增產率間得到密切相關關係，故可由土壤或植物體分折結果來推測，水田土壤中缺矽情形。 Benificial effect of silica on rice giving percentage yield increment ranging from 0 to 10% has been demonstrated by this field experiment. More over, the field data were found to be highly correlated to silica content in plant leaf and weak acid soluble silica in the soil. From this fact, plant analysis and soil tesing look most promising in judging the solica requirement for rice.