Journal article

Publication year: 1981

Pages: 137-149

Journal: Soil Science and Plant Nutrition

Volume number: 27

Issue number: 2

ISSN: 0038-0768

eISSN: 1747-0765

DOI Link: https://doi.org/10.1080/00380768.1981.10431265

Publisher: Taylor and Francis Group

Abstract: 
K uptake by rice was studied in relation to the K dynamics of 2 soils (Pili clay and Maligaya silty clay loam) from the principal rice growing provinces in the Philippines (Camarines Sur and Nueva Ecija). The K dynamics were determined by means of the EUF [electroultrafiltration] technique and by establishing the K buffer capacities of both soils. Although the Maligaya silty clay loam was higher in exchangeable K, the K uptake by the crop, particularly at the early growing stage, and the K concentrations of the young crop were higher in the Pili clay. This was consistent with the EUF extractable soil K (EUF-K), indicating that the EUF-K was a better indicator of K availability than the exchangeable K. The Maligaya silty clay loam showed a higher K buffer capacity than the Pili clay. This higher K buffer capacity also contributed to higher K uptake, especially during the later growth stage. Maximum grain yields, however, were obtained when the value of the total EUF-K fractions was above 40 ppm K at the maximum tillering stage of the rice crop.

Harvard Citation style: WANASURIA, S., MENGEL, K. and DEDATTA, S. (1981) USE OF THE ELECTROULTRAFILTRATION (EUF) TECHNIQUE TO STUDY THE POTASSIUM DYNAMICS OF WETLAND SOILS AND POTASSIUM UPTAKE BY RICE, Soil Science and Plant Nutrition, 27(2), pp. 137-149. https://doi.org/10.1080/00380768.1981.10431265

APA Citation style: WANASURIA, S., MENGEL, K., & DEDATTA, S. (1981). USE OF THE ELECTROULTRAFILTRATION (EUF) TECHNIQUE TO STUDY THE POTASSIUM DYNAMICS OF WETLAND SOILS AND POTASSIUM UPTAKE BY RICE. Soil Science and Plant Nutrition. 27(2), 137-149. https://doi.org/10.1080/00380768.1981.10431265