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

This Article Full Text 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 Sneller, E. G. Articles by Laboski, C. A. M. Search for Related Content PubMed Articles by Sneller, E. G. Articles by Laboski, C. A. M. Agricola Articles by Sneller, E. G. Articles by Laboski, C. A. M. Related Collections Phosphorus Maize Nutrient Cycling Nutrient Management Soil Analysis Animal Waste

MANURE

Phosphorus Source Effects on Corn Utilization and Changes in Soil Test

Dep. of Soil Science, Univ. of Wisconsin, 1525 Observatory Dr., Madison, WI 53706

^* Corresponding author (laboski{at}wisc.edu).

Estimating crop availability of manure P and changes in soil test P (STP) with manure application are essential components of nutrient management planning. The objectives of this field study were to (i) evaluate manure P availability to crop growth through crop P uptake and yield; (ii) determine if second-year residual P availability from manure application is different than fertilizer; and (iii) evaluate the effect of P source on changes in STP levels. Research plots were established at Arlington and Marshfield, WI, in 2005 on fields with low STP. All P sources (dairy slurry, dairy solid, swine slurry, pelletized poultry litter, and fertilizer) were applied at three target rates of 39, 79, 118 kg total P ha^–1 in spring 2005 before planting corn (Zea mays L.). No additional P was applied in 2006. Phosphorus application increased early season biomass, silage and grain yield, and P uptake. In 2005, all manures had silage and grain yields and P uptakes, along with silage P recoveries, that were not significantly different than fertilizer. In 2006, the residual effect of 2005 P applications rates were observed; however, there was no significant difference in any measure of crop response between any manure and fertilizer. These data suggest that manure total P is as available to corn as fertilizer P in the year of application and in the following year. Manure application changed STP levels as much as fertilizer in terms of total P applied.

Abbreviations: DM, dry matter • MWEP, manure water-extractable phosphorus • NRCS, Natural Resources Conservation Service • RM, relative maturity • STP, soil test P • STP, change in soil test P

All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher.

Received for publication October 20, 2008.