Agriculture Reference
In-Depth Information
6.2.2 TREATMENT REGIMEN
Treatments consisted of six combinations of different residual organic ma-
terials and biofertilizers and control as follows:
1. Farmyard manure (FYM) applied on nitrogen basis at 60 kg ha
−1
to
each rice and wheat crops.
2. Vermicompost (VC) applied on nitrogen basis at 60 kg ha
−1
to each
rice and wheat crops. FYM and VC were applied to both rice and
wheat, whereas mung bean was grown on residual fertility.
3. FYM + crop residue (CR) whereas rice and wheat residues were
applied at 6 t ha
−1
to wheat and mung bean, respectively, and mung
bean residue applied at 3 t ha
−1
to rice.
4.
VC + CR.
5.
FYM + CR + biofertilizers (B) including cellulolytic culture (CC)
and phosphate-solubilizing bacteria (PSB) were used in all the
crops, whereas BGA, Azotobacter, and Rhizobium applied in rice,
wheat, and mung bean, respectively.
6.
VC + CR + B.
7.
Control (no fertilizer applied).
As biofertilizers, CC and PSB were used in all the crops, whereas
BGA,
Azotobacter
, and
Rhizobium
applied in rice, wheat, and mung
bean, respectively. Cellulolytic culture containing four fungi (
Aspergil-
lus awamori, Trichoderme viride, Phanerochaete chrysosporium
, and
As-
pergillus wolulens
) was inoculated at the time of residue incorporation,
whereas
Azotobacter, Rhizobium,
and PSB (
Pseudomonas striata
) were
used to inoculate the seeds as per the treatments. Farmyard manure used in
the previous crops was well decomposed. It contained N (6,150 mg kg
−1
),
P (2,600 mg kg
−1
), K (3,150 mg kg
−1
), Mn (11.5 mg kg
−1
), Zn (39.5 mg
kg
−1
), Cu (2.65 mg kg
−1
), and Fe (21.5 mg kg
−1
) and had a C/N ratio of
23.5. Similarly VC contained N (1,1950 mg kg
−1
), P (6,283mg kg
−1
), K
(6,950 mg kg
−1
), Mn (37.5 mg kg
−1
), Zn (87 mg kg
−1
), Cu (8.5 mg kg
−1
),
and Fe (57.5 mg kg
−1
) and had a C/N ratio of 17.5. The chemical composi-
tions of crop residues are given in Table 1.
