| Three experiments were included in this study.Test 1:It studied on nutrient variation of different position on corn stalk during different period of duration.It indicated that dry matter and organics on single corn stalk no more increased on the 121st day period of duration.All the crude protein,reducing sugar,calcium,phosphonium and aerogenesis degraded uninterruptedly(L;P<0.01).Cellulose,hemicellulose kept on increasing(L;P<0.01).Blade nutritive value had an advantage to haulm,but the proportion of blade to total strain dissipate(L;P<0.01).The test results indicated that corn stalk harvest better at earlier complied with nutritive value.Test 2:It studied on nutrient variation of different storages on corn stalk.It indicated that dry matter of corn stalk descend(L;P<0.01)during storage,while organics,crude protein,lignin,hemicellulose,cellulose kept steady within the latter two weeks.Mould of corn stalk reduced continuously in the anterior 55 days,and then increased later.In respect to nutritive value,it will keep steady two weeks later.Test 3:It studied on nutrient variation of different additivess on corn stalk.It indicated that salt,urea,formaldehyde,formic acid,propanoic acid or mix processing of storage on corn stalk improved the fermentation quality and the nutritional value;and obtained the high dry material retention rat(eL;P<0.01).The formic acid effect was best in 0.3% treatment group;the propionic acid effect was best in 0.6% treatment group. |
