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KMID : 0903519720150010077
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1972 Volume.15 No. 1 p.77 ~ p.84
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Studies on the Use of Radioisotope Tracer Techniques to Investigate and Improve the Root Activities in Rice Plant(Ⅰ) - Effect of Water Control in Soil of the Paddy Field Lacking in the Special Mineral Nutritions -
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안학수/Ahn, Hak Soo
정희돈/김규원/심상칠/Chung, Hee Don/Kim, Kyu Won/Shim, Sang Chill
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Abstract
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A field experiment was conducted to determine the factors responsible in limiting nutrient up take and root activity in low productive paddy field. Radiosotope of phosphorus-32 was used as a tracer. Results of the study were as follows:
1. On yield components responsible for increase yield indicated that number of ears per panicle and ripening ratio were closely related to increase yield.
2. Root volume or root feeding area has significant influence in increasing rice yield.
3. Root volume indicative of root activity and nutrient uptake can be effected by reasonable water control.
4. The combined application of calcium, silica, and magnesium(as a fused magnesium phosphate. the Kyun-gi Chemical Co. products.) with water control, although under conditions of large amount application of nitrogen, was found to be increased the maturing rate.
5. In the plots of water control, the number of roots per one volume were less than that of the continuous flooding plots, but the weight per root was heavier than the flooding plot ones.
6. Improvement of the present native culture method could effectively increase paddy rice yield.
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