Background:Biochar(BC)amendment to soils can affect crop yields negatively,especially during the first season following application,by binding essential nutrients;however,little data exist on its effects on warm‐clim...Background:Biochar(BC)amendment to soils can affect crop yields negatively,especially during the first season following application,by binding essential nutrients;however,little data exist on its effects on warm‐climate forage yields and nutritive values.We determined the effects of BC(0,5,10MgDMha^(−1)),dairy manure(0 and 10 MgDMha^(−1)),soil type(loamy sand,sandy loam,clay loam),and tillage practices(till[incorporation of soil amendments with tillage]vs.no till[soil amendments surface application])on the nutrient profile and dry matter yield(DMY)of Bermudagrass(Cynodon dactylon(L.)Pers.),maize(Zea mays L.),and sorghum‐Sudan(Sorghum drummondii(Nees ex Steud.)Millsp.&Chase).Methods:Bermudagrass was harvested at the boot stage,sorghum‐Sudan when the canopy reached 90%light interception,and the maize 90–120 days after planting as silage.Samples were dried and analyzed for nutrients and DMY.Results:BC and manure application were not detrimental to forage production or nutritive value to cattle in the first growing season.Conclusions:Effects varied across tillage and soil type;thus,it is essential to consider soil texture and nutrient makeup before choosing the proper tillage and amendments.Longer study periods may produce different results since,over time,BC can act as a slow‐release source of nutrients.展开更多
基金U.S.Department of Agriculture,Grant/Award Number:NR213A750013G032NRCS grant,Grant/Award Number:NR213A750023C001Capacity Building Grants for Non‐Land Grant College of Agriculture,Grant/Award Number:2020‐70001‐31552。
文摘Background:Biochar(BC)amendment to soils can affect crop yields negatively,especially during the first season following application,by binding essential nutrients;however,little data exist on its effects on warm‐climate forage yields and nutritive values.We determined the effects of BC(0,5,10MgDMha^(−1)),dairy manure(0 and 10 MgDMha^(−1)),soil type(loamy sand,sandy loam,clay loam),and tillage practices(till[incorporation of soil amendments with tillage]vs.no till[soil amendments surface application])on the nutrient profile and dry matter yield(DMY)of Bermudagrass(Cynodon dactylon(L.)Pers.),maize(Zea mays L.),and sorghum‐Sudan(Sorghum drummondii(Nees ex Steud.)Millsp.&Chase).Methods:Bermudagrass was harvested at the boot stage,sorghum‐Sudan when the canopy reached 90%light interception,and the maize 90–120 days after planting as silage.Samples were dried and analyzed for nutrients and DMY.Results:BC and manure application were not detrimental to forage production or nutritive value to cattle in the first growing season.Conclusions:Effects varied across tillage and soil type;thus,it is essential to consider soil texture and nutrient makeup before choosing the proper tillage and amendments.Longer study periods may produce different results since,over time,BC can act as a slow‐release source of nutrients.
