STUDIES WITH WASTE SULPHITE LIQUOR: I. EFFECTS OF WASTE SULPHITE LIQUOR ON CROP YIELDS AND ON SOIL PROPERTIES

摘要

Agreenhouseinvestigationwasconductedtoassesstheeffectsofwastesulphiteliquorsolids(W.S.L.S.)oncropyieldsandonsomechemicalandphysicalpropertiesofanIntervalsiltloamsoil.TheresponseofoatsandItalianryegrasstonitrogenappliedasammoniumsulphateservedasastandardforevaluatingthe3percentnitrogencontainedintheammonium-baseW.S.L.S.Significantincreasesinyieldsofoatsandryegrassresultedfromammoniumsulphate-nitrogenatratesof60and120a€?lb.peracrerespectively.W.S.L.S.at2tonsperacre,supplying120a€?lb.peracreofnitrogen,gaveincreasesofasimilarmagnitude.HigherratesofW.S.L.S.gaveadditionalincreasesinyields.ThenitrogencontentofthetwocropswasincreasedbyapplyingW.S.L.-nitrogenat480a€?lb.peracre.Ammonium-sulphatenitrogenat60a€?lb.peracreandW.S.L.-nitrogenat120a€?lb.peracreincreasedthetotalnitrogenuptakebyoatsandryegrass.W.S.L.S.increasedtheorganicmattercontent,cationexchangecapacityandexchang...