NDLI: Short-term and seasonal soil nitrogen dynamics and recovery by bermudagrass irrigated with $^{15}$N labelled swine lagoon effluent

Content Provider	Springer Nature Link
Author	Zhang, Jiuquan Varco, Jac J. Adeli, Ardeshir
Copyright Year	2016
Abstract	Rapid and efficient utilization of swine (Sus scrofa domestucus) lagoon effluent nitrogen (N) by crops is necessary to minimize N losses and environmental pollution. The objective of this study was to determine the dynamics and fate of effluent N applied to bermudagrass (Cynodon dactylon (L.) pers.) using $^{15}$N tracer technology as influenced by irrigation date.Anaerobic swine lagoon effluent was labeled with enriched ($^{15}$NH$_{4}$)$_{2}$SO$_{4}$ and applied to an acid silty clay soil. Microplots (1 × 1 m) were established for each irrigation event (main plots) and soil was sampled and bermudagrass was harvested on day 0, 1, 2, 3, 7, and 14 (subplots) following irrigation. Soil sampling coincided with harvests to monitor effluent derived $^{15}$N transformations.Application in July when bermudagrass growth was most active resulted in a plant $^{15}$N recovery of 59 %. Crop recoveries for June and September irrigation events were equal at 33 %. Nitrification of effluent NH$_{4}$ $^{+}$-N occurred rapidly within 24 h to 48 h following application. Rapid losses of effluent $^{15}$N within 1 d suggest a high probability for NH$_{3}$ volatilization, while losses following rainfall and high soil moisture content in June infer denitrification was most active. Lack of $^{15}$N detection in the 30 to 60 cm soil depth indicated a low probability of leaching losses, while unaccounted for $^{15}$N was 45, 5, and 30 % for irrigation events in June, July, and September, respectively.Bermudagrass recovery, dynamics and fate of effluent N applied to an acid soil varied with environmental conditions affecting crop growth and N uptake and soil N transformations.
Starting Page	437
Ending Page	451
Page Count	15
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	410
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-09-05
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nitrogen Swine lagoon effluent Bermudagrass $^{15}$N recovery Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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