Reducing Freshwater Toxicity while Maintaining Weed Control, Profits, And Productivity: Effects of Increased Crop Rotation Diversity and Reduced Herbicide Usage.

Citation data:

Environmental science & technology, ISSN: 1520-5851, Vol: 51, Issue: 3, Page: 1707-1717

Publication Year:
2017
Usage 21
Abstract Views 17
Link-outs 4
Captures 14
Readers 12
Exports-Saves 2
Mentions 5
News Mentions 3
Blog Mentions 2
Social Media 4
Tweets 4
Citations 1
Citation Indexes 1
PMID:
28112904
DOI:
10.1021/acs.est.6b04086
Author(s):
Hunt, Natalie D, Hill, Jason D, Liebman, Matt
Publisher(s):
American Chemical Society (ACS)
Tags:
Chemistry, Environmental Science
Most Recent Tweet View All Tweets
Most Recent Blog Mention
Most Recent News Mention
article description
Increasing crop rotation diversity while reducing herbicide applications may maintain effective weed control while reducing freshwater toxicity. To test this hypothesis, we applied the model USEtox 2.0 to data from a long-term Iowa field experiment that included three crop rotation systems: a 2-year corn-soybean sequence, a 3-year corn-soybean-oat/red clover sequence, and 4-year corn-soybean-oat/alfalfa-alfalfa sequence. Corn and soybean in each rotation were managed with conventional or low-herbicide regimes. Oat, red clover, and alfalfa were not treated with herbicides. Data from 2008-2015 showed that use of the low-herbicide regime reduced freshwater toxicity loads by 81-96%, and that use of the more diverse rotations reduced toxicity and system dependence on herbicides by 25-51%. Mean weed biomass in corn and soybean was <25 kg ha in all rotation × herbicide combinations except the low-herbicide 3-year rotation, which contained ∼110 kg ha of weed biomass. Corn and soybean yields and net returns were as high or higher for the 3- and 4-year rotations managed with the low-herbicide regime as for the conventional-herbicide 2-year rotation. These results indicate that certain forms of cropping system diversification and alternative weed management strategies can maintain yield, profit, and weed suppression while delivering enhanced environmental performance.

This article has 0 Wikipedia mention.