Improvement of Nutrient Uptake, Yield of Black Sesame (Sesamum indicum L.), and Alluvial Soil Fertility in Dyke by Spent Rice Straw from Mushroom Cultivation as Biofertilizer Containing Potent Strains of Rhodopseudomonas palustris
Table 1
Initial soil physicochemical properties of dyked alluvial soil collected from upland field cultivated sesame in Vietnam.
Parameter
Value
pHH2O
5.86 ± 0.05
pHKCl
4.87 ± 0.06
Electrical conductivity, EC (mS·cm−1)
156.7 ± 3.96
Organic matter, OM (%)
1.43 ± 0.24
Nitrogen concentration
Total nitrogen (%)
0.16 ± 0.01
Ammonium ion (mg NH4+·kg−1)
35.0 ± 7.79
Nitrate ion (mg NO3−·kg−1)
22.1 ± 0.89
Phosphorus concentration
Total phosphorus (% P)
0.024 ± 0.001
Available phosphorus (mg·P·kg−1)
32.1 ± 0.48
Fractionation of soil phosphorus (mg kg−1)
Aluminum-phosphorus (Al-P)
63.8 ± 4.57
Iron-phosphorus (Fe-P)
284.3 ± 5.71
Calcium-phosphorus (Ca-P)
216.8 ± 7.12
Exchangeable cations (meq 100 g−1)
K+
0.66 ± 0.09
Na+
0.63 ± 0.07
Ca2+
0.79 ± 0.12
Mg2+
2.42 ± 0.24
Cation exchange capacity (CEC)
10.4 ± 0.83
Soil separate (%) and texture
Silty clay
Sand
5.50 ± 0.13
Silt
46.1 ± 3.10
Clay
48.4 ± 1.81
Values are mean and its standard deviation, n = 3.