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				  Amelioration of salt-affected soils requires an integrated management approach, which not only improves their effectiveness for improving soil properties, but also increases the crop production and quality of the produce. Hence, a study was planned to evaluate combined use of organic and inorganic amendments for better rehabilitation of salt affected soil in ricewheat cropping sequence from 2013 to 2016. Treatments included T 1  - control, T 2  - gypsum @ 100 SGR, T 3  - CaCl 2  @ 50% SGR, T 4  - CaCl 2  @ 50% SGR + biogas slurry @ 10 tˑha -1 , T 5  - H 2 SO 4  @ 25% GR, T 6  - H 2 SO 4  @ 25% SGR + biogas slurry @10 tˑha -1 . A saline sodic field was selected, prepared and leveled. Composite soil samples were collected and analyzed for pH s  = 9.15, EC e  (dS m -1 ) = 4.86, SAR (mmol L -1 ) 1/2  = 42.52 and GR (tˑha -1 ) = 8.64. Experiment was laid out in RCBD with three replications. The inorganic amendments (gypsum and CaCl 2 ) were applied 30 days before rice transplanting in the respective treatment plots, followed by leaching while biogas slurry was applied 15 days before transplanting and H 2 SO 4  was applied with first irrigation. Recommended dose of fertilizer 120-110-70 NPK kg ha -1  for wheat (Inqlab-91) and 110-90-60 NPK kg ha -1  for rice (Shaheen Basmati) was applied. Soil samples were collected before application of amendment and after harvesting of each crop. Straw and grain/paddy yield data were recorded at maturity. Pooled data showed that grain/paddy and straw yield of wheat and rice crop was higher in T 2  (gypsum @ 100% SGR), but statistically (P≤ 0.05) non significant with T 4  (CaCl 2  @ 50% SGR + biogas slurry @ 10 tˑha -1 ). T 3  (CaCl 2  @ 50 % SGR) was at par with T 6  (H 2 SO 4  @ 25% SGR + biogas slurry @ 10 tˑha -1 ), followed by T 5  (H 2 SO 4  @ 25% SGR). The minimum yield was recorded in T 1  (control). Soil analysis showed that pH s , EC e  and SAR were significantly decreased in T 2 , (Gypsum @ 100% SGR), followed by T 4  (CaCl 2  @ 50% SGR + biogas slurry @ 10 tˑha -1 ). Hence, CaCl 2  @ 50% SGR + biogas slurry @ 10 tˑha -1  may be an effective alternative reclamation strategy for areas that are restricted use because of salinity.

cercetări agronomice în moldova

Comparison the Efficient Reclamation of Different Inorganic Materials with Organic Amendments to Rice-Wheat Crop Sustainable Production in Salt-Affected Soils