437354.fig.004a
(a)
437354.fig.004b
(b)
437354.fig.004c
(c)
Figure 4: Total organic N, neutral detergent insoluble N (NDIN), and acid detergent insoluble N (ADIN) dynamics in manure in the dry season experiment (DM basis). Error bars represent standard error of means. Continuous lines represent best-fit regression equations for organic N dynamics in manure during the dry season experiment. represents the amount of organic N, NDIN, or ADIN remaining in the manure (% of initial content, DM basis). The solid line (—) represents the Medium quality manure, no urine treatment. The dashed line (- - - -) represents the urine-amended Medium quality manure treatment. The dotted line (····) represents the Low quality manure, no urine treatment. The dot-dash line (-··-··) represents the urine-amended Low quality manure treatment. (a) Total organic N dynamics (% N, DM basis). Medium quality manure, no urine: , . Medium quality manure, with urine: , . Low quality manure, no urine: , . Low quality manure, with urine: , . The rate equations for NDIN dynamics between the four treatments did not differ at significance level α = 0.05. (b) NDIN dynamics (%NDIN, DM basis). Medium quality manure, no urine: , . Medium quality manure, with urine: , . Low quality manure, no urine: , . Low quality manure, with urine: , . The rate equations for organic N dynamics between the four treatments did not differ at significance level α = 0.05. (c) ADIN dynamics (%ADIN, DM basis). Medium quality manure, no urine: , . Medium quality manure, with urine: , . Low quality manure, no urine: , . Low quality manure, with urine: , . Rate constants for ADIN dynamics in manure with no urine added differed between the manure sources ( ). No difference was observed in the urine treatments (α = 0.05).