HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Rouquette, F. M. Articles by Duble, R. L. Search for Related Content PubMed Articles by Rouquette, F. M., Jr. Articles by Duble, R. L. Agricola Articles by Rouquette, F. M. Articles by Duble, R. L.

Recycling and Recovery of Nitrogen, Phosphorus, and Potassium by Coastal Bermudagrass: II. Under Grazing Conditions with Two Stocking Rates¹

ABSTRACT

The effect of two stocking rates on the recycling of N, P, and K was studied for 2 years on a Coastal bermudagrass [Cynodon dactylon (L.) Pers.] sward. Samples for chemical analysis were taken at 14-day intervals. Available forage, forage yield, and forage consumption were estimated from samples taken at 2- to 4-week intervals. Soil samples were taken prior to, during, and at termination of the grazing trial. Plant nutrient recycling on the high stocked pastures was approximately twice as great during the dry, 1969 season and about 10% higher during the 1970 season compared to that on the low stocked pastures. Recoveries of applied plant nutrients averaged over stocking rates were 84, 50, and 155% for N, P, and K, respectively, during 1969, and 180, 73, and 172% for N, P, and K, respectively, during 1970. There was a substantial soil accumulation of plant nutrients under both stocking rates with a considerable advantage in favor of the high stocked pastures. On the high stocked pastures, total soil N accumulation was slightly less than twofold, available soil P increased threefold, and available soil K increased more than twofold over the 2-year period.

Key Words: nutrient recycling • nutrient recovery • Cynodon dactylon

¹ Contribution of Texas A&M University Agricultural Research and Extension Center, Overton.

² Respectively, Assistant Professors, Texas A&M Univ. Agr. Res. & Ext. Center, Overton 75684. Assistant Professor, Soil and Crop Sciences, Texas A&M Univ., College Station 77843.

Received for publication May 1, 1972.