Applied and Environmental Soil Science

Research Article

Influence of NaCl-Induced Salinity and Cd Toxicity on Respiration Activity and Cd Availability to Barley Plants in Farmyard Manure-Amended Soil

Table 4

Treatment effects on CO₂-C evolution rate (mg C g⁻¹ soil day⁻¹) during incubation time.


Cd levels	NaCl levels	Incubation time
		Day 1	Day 3	Day 7	Day 14	Day 21	Day 28
		Without FYM

0.5 ppm Cd	S0	0.0276	0.0140	0.0065	0.0035	0.0033	0.0033	0.0018
	S1	0.0263	0.0134	0.0062	0.0035	0.0033	0.0034	0.0036
	S2	0.0222	0.0109	0.0056	0.0029	0.0031	0.0031	0.0023
	S3	0.0164	0.0090	0.0049	0.0026	0.0025	0.0027	0.0024

LSD_S		0.0057	0.0025	0.0013	0.0016	0.0013	0.0017	—

24 ppm Cd	S0	0.0197	0.0105	0.0051	0.0029	0.0025	0.0025	0.0016
	S1	0.0181	0.0097	0.0046	0.0028	0.0023	0.0024	0.0020
	S2	0.0094	0.0055	0.0028	0.0017	0.0015	0.0015	0.0040
	S3	0.0069	0.0034	0.0017	0.0010	0.0009	0.0009	0.0013

LSD_S		0.0026	0.0044	0.0025	0.0011	0.0016	0.0008	—

LSD_CdS		0.0040	0.0033	0.0018	0.0013	0.0013	0.0012

Cd levels	NaCl levels	With FYM

0.5 ppm Cd	S0	0.1145	0.0653	0.0377	0.0226	0.0196	0.0177	0.0034
	S1	0.1125	0.0643	0.0373	0.0229	0.0197	0.0180	0.0025
	S2	0.1108	0.0631	0.0361	0.0225	0.0195	0.0178	0.0030
	S3	0.1013	0.0569	0.0324	0.0196	0.0175	0.0157	0.0027

LSD_S		0.0055	0.0046	0.0018	0.0012	0.0006	0.0009	—

24 ppm Cd	S0	0.1154	0.0658	0.0373	0.0221	0.0194	0.0175	0.0029
	S1	0.1137	0.0647	0.0367	0.0218	0.0193	0.0177	0.0021
	S2	0.0942	0.0544	0.0318	0.0191	0.0171	0.0153	0.0036
	S3	0.0769	0.0457	0.0275	0.0167	0.0144	0.0130	0.0036

LSD_S		0.0071	0.0040	0.0024	0.0010	0.0009	0.0011

LSD_CdS		0.0058	0.0039	0.0019	0.0010	0.0007	0.0009

LSD_CdSF		0.0047	0.0035	0.0018	0.0011	0.0010	0.0010

(P < 0.05): time effect; LSD_S (P < 0.05): salt effect; LSD_CdS (P < 0.05): Cd salt effect; LSD_CdSF (P < 0.05) = Cd salt FYM effect, S0 (without NaCl), S1 (30 mM NaCl), S2 (60 mM NaCl), and S3 (120 mM NaCl); NS = not significant.