The valorization of liquid manure as fertilizer is important in the nutrient cycle on the farm. Optimization of manure spreading is an element essential to improve the fertilizer value of the manure and reduce the impacts on soil, air and water. Some of the limitations of such optimization come from the machinery itself. For most of the spreaders available on the market, calibration is difficult to make in order to obtain agronomic doses and they are often misadapted to the crops’ needs and to soils prone to compaction. In order to improve the situation, a study was realized to evaluate the technical performances of existing equipment and to suggest modifications that would improve the precision of the application rates, the agronomic efficiency by more appropriate application techniques and lower the impact of compaction on certain soils. Tests were done on two types of spreaders, the one using a pump to spread and the other using a vacuum system using aspersion at the top of the tank or at the bottom. The test showed that more than 50% of the manure spreaders available in Quebec spread doses (10 to 160 m3\/ha )superior to the hydraulic absorption capacity of the soil (20 to 40 m3\/ha) which can lead to run off. The longitudinal uniformity of spreading is good as the pump or vacuum system maintain the same flow rate through out emptying. It is not the case for the transversal uniformity as in many cases the dose applied in the center was 3 to 4 times higher than the one on the sides. The transversal wind has also an important effect on the distribution. The spreaders delivering manure through half circles devices showed a better transversal uniformity. The manure spreader of more than 3000 gal. (13 650 L) are most likely to produce important compaction as the soil pressure resulting from their passage is higher than mid-size tractors. The recommendations to improve the spreaders is to install a adjustable restriction valve between the pump and the delivering device to reduce the application rate. Low spreading with standard device or low boom would improve the transversal uniformity. Low pressure tires or tracks would reduce the compaction induced by spreading and the use of smaller tanks would also reduce the compaction. Direct injection systems tend to apply manure at high rates at 10 to 15 cm depth that may not be all used by the plant. Shallow injection or direct incorporation just after spreading with weeding type tools mounted on the spreader seem to be the best techniques to limit run off and contribute to nutrients retention.<\/p>\n
This study gives very interesting information on the spreader and the weak elements that have to be improve to assure a better valorisation of the manure on the crops.<\/p>\n","protected":false},"excerpt":{"rendered":"
The valorization of liquid manure as fertilizer is important in the nutrient cycle on the farm. Optimization of manure spreading is an element essential to improve the fertilizer value of the manure and reduce the impacts on soil, air and water. Some of the limitations of such optimization come from the machinery itself. For most […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[8882,10871,13816,2858,17673,20525,4023,23694,4663,527,206,1007,20007,14804,308,169,258,858,10858,63,16262,2574,17743,1533,210,20912,471,4599,20911,4874,1579,6053,69],"class_list":["post-1335","post","type-post","status-publish","format-standard","hentry","category-environment","tag-al","tag-apply","tag-ass","tag-capacity","tag-center","tag-compaction-tank-a-lisier","tag-cycle","tag-dir","tag-don","tag-efficiency","tag-evaluation","tag-flow-rate","tag-gh","tag-hal","tag-liquid-manure","tag-manure","tag-manure-management","tag-manure-spreader","tag-mark","tag-performance","tag-pl","tag-precision","tag-prod","tag-size","tag-slurry","tag-some","tag-spreading","tag-stall","tag-t","tag-tan","tag-test","tag-use","tag-water"],"_links":{"self":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/1335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/comments?post=1335"}],"version-history":[{"count":0,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/1335\/revisions"}],"wp:attachment":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=1335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=1335"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=1335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}