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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Mowrey, D. P. Articles by Matches, A. G. Search for Related Content PubMed Articles by Mowrey, D. P. Articles by Matches, A. G. Agricola Articles by Mowrey, D. P. Articles by Matches, A. G.

Persistence of Sainfoin under Different Grazing Regimes

USDA-ARS Forage and Livestock Res. Laboratory, El Reno, OK 73036
Dep. of Agronomy, Horticulture and Entomology, Texas Tech. Univ., Lubbock, TX 79409

^* Corresponding author.

Sainfoin (Unobrychis viciaefolia Scop.), a non-bloat inducing legume, is well adapted to the calcareous soils of the Southern Great Plains. Poor persistence imder some managements has limited its; use for grazing. Our objectives were to determine the effect of plant growth stage at defoliatioin and defoliation intensity on persistence of sainfoin. Nitrogen fertillized (100 kg N ha^–1) ‘Renumex’ sainfoin was grown under irrigation on a Pullman clay loam (fine, mixed, thermic Torretic Paleustolll) near Lubbock, TX. Light (L), medium (M), and heavy (H) grazing intensities were applied at the bud (B), flower (F), and seed shatter (S) stages of growth. Across growth stages, L, M, and H intensities averaged 52, 69, and 87% removal of pre-graze herbage mass, respectively. Over the 2 yr, sainfoirt stands declined 20 and 43% when defoliated at the B and F stages under H defoliation intensity. Stands remained above 80% for the L and M intensities. Stands increased from reseeding in the S treatments by 35, 31, and 16% for the L, M, and H defoliations, respectively. Root concentrations of total nonstructural carbohydrate (TNC) began to decrease with the initiation of spring growth reached their seasonal low in June, and then increased into late summer and autumn. Average TNC for H (130 g kg^–1) was less than TNC in roots of L and M (155 g kg^–1). Our findings indicate thaf sainfoin defoliated at the B or F stages of growth under L or M intensities of defoliation may have acceptable stand persistem when grown under irrigation in the Southern Great Plains.

Received for publication February 26, 1990.

This article has been cited by other articles:

				M. D. Peel, K. H. Asay, D. A. Johnson, and B. L. Waldron Forage Production of Sainfoin across an Irrigation Gradient Crop Sci., March 1, 2004; 44(2): 614 - 619. [Abstract] [Full Text] [PDF]