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
Ca^2+	0.79 ± 0.12
Mg^2+	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.