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Improving Lowland Rice (O. sativa L. cv. MR219) Plant Growth Variables, Nutrients Uptake, and Nutrients Recovery Using Crude Humic Substances.

Palanivell P, Ahmed OH, Ab Majid NM, Jalloh MB, Susilawati K - ScientificWorldJournal (2015)

Bottom Line: A pot experiment was conducted to determine the effects of crude humic substances on rice plant growth, nutrients uptake, nutrients recovery, and soil chemical properties using an acid soil mixed with three rates of crude humic substances (20, 40, and 60 g pot(-1)).However, the lowest rate of crude humic substances (20 g pot(-1)) significantly improved total dry matter, nutrients uptake, nutrients recovery, and soil nutrients availability compared with crude humic substances (40 and 60 g pot(-1)) and the normal fertilization.Apart from improving growth of rice plants, crude humic substances can be used to ameliorate acid soils in rice cultivation.

View Article: PubMed Central - PubMed

Affiliation: Department of Crop Science, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia Bintulu Sarawak Campus, 97008 Bintulu, Sarawak, Malaysia.

ABSTRACT
High cation exchange capacity and organic matter content of crude humic substances from compost could be exploited to reduce ammonia loss from urea and to as well improve rice growth and soil chemical properties for efficient nutrients utilization in lowland rice cultivation. Close-dynamic air flow system was used to determine the effects of crude humic substances on ammonia volatilization. A pot experiment was conducted to determine the effects of crude humic substances on rice plant growth, nutrients uptake, nutrients recovery, and soil chemical properties using an acid soil mixed with three rates of crude humic substances (20, 40, and 60 g pot(-1)). Standard procedures were used to evaluate rice plant dry matter production, nutrients uptake, nutrients recovery, and soil chemical properties. Application of crude humic substances increased ammonia volatilization. However, the lowest rate of crude humic substances (20 g pot(-1)) significantly improved total dry matter, nutrients uptake, nutrients recovery, and soil nutrients availability compared with crude humic substances (40 and 60 g pot(-1)) and the normal fertilization. Apart from improving growth of rice plants, crude humic substances can be used to ameliorate acid soils in rice cultivation. The findings of this study are being validated in our ongoing field trials.

No MeSH data available.


Related in: MedlinePlus

Treatments (C1: soil alone, C2: soil + complete fertilization, CHS1: soil + complete fertilization + 20 g rice straw compost + 2 g sawdust ash, CHS2: soil + complete fertilization + 40 g rice straw compost + 4 g sawdust ash, and CHS3: soil + complete fertilization + 60 g rice straw compost + 6 g sawdust ash) effect on soil pH, total titratable acidity, exchangeable H+, exchangeable Al3+, and available P content at 90 days after seeding. Different alphabets indicate significant difference between means using Tukey's test at P ≤ 0.05. The error bars are the ± standard error of quadruplicates.
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Related In: Results  -  Collection


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fig7: Treatments (C1: soil alone, C2: soil + complete fertilization, CHS1: soil + complete fertilization + 20 g rice straw compost + 2 g sawdust ash, CHS2: soil + complete fertilization + 40 g rice straw compost + 4 g sawdust ash, and CHS3: soil + complete fertilization + 60 g rice straw compost + 6 g sawdust ash) effect on soil pH, total titratable acidity, exchangeable H+, exchangeable Al3+, and available P content at 90 days after seeding. Different alphabets indicate significant difference between means using Tukey's test at P ≤ 0.05. The error bars are the ± standard error of quadruplicates.

Mentions: The treatments with the different rates of crude humic substances (CHS1, CHS2, and CHS3) significantly increased soil pH compared with C1 (soil alone) and C2 (normal fertilization) (Figure 7). Soil pH also increased with increasing rate of crude humic substances (CHS1 < CHS2 < CHS3) (Figure 7) due to the high pH and basic cations of the sawdust ash used in this study (Table 2). Soil total titratable acidity and exchangeable H+ were significantly lower in the crude humic substances treatments (CHS1, CHS2, and CHS3) compared with soil alone (C1) and normal fertilization (C2) (Figure 7). The high pH and basic cations of the sawdust ash (Table 2) in CHS1, CHS2, and CHS3 might have reduced soil titratable acidity and exchangeable H+. Soil alone treatment (C1) showed the highest total titratable acidity and exchangeable Al3+ compared with other treatments because some of the P fertilizer (ERP) in C2, CHS1, CHS2, and CHS3 might have reduced exchangeable Al3+ and total titratable acidity compared with soil alone (C1) as in acidic soils, hydroxides and oxides of Al3+ are precipitated by H2PO4− as variscite and various minerals of the plumbogummite group [14]. Available P in normal fertilization and crude humic substances (CHS1, CHS2, and CHS3) were statistically similar (Figure 7). However, the highest rate of crude humic substances (CHS3) showed higher available P compared with CHS2. The lower available P in CHS2 compared with CHS3 was due to the higher P uptake and recovery by rice plants under CHS2 as those under CHS3 died.


Improving Lowland Rice (O. sativa L. cv. MR219) Plant Growth Variables, Nutrients Uptake, and Nutrients Recovery Using Crude Humic Substances.

Palanivell P, Ahmed OH, Ab Majid NM, Jalloh MB, Susilawati K - ScientificWorldJournal (2015)

Treatments (C1: soil alone, C2: soil + complete fertilization, CHS1: soil + complete fertilization + 20 g rice straw compost + 2 g sawdust ash, CHS2: soil + complete fertilization + 40 g rice straw compost + 4 g sawdust ash, and CHS3: soil + complete fertilization + 60 g rice straw compost + 6 g sawdust ash) effect on soil pH, total titratable acidity, exchangeable H+, exchangeable Al3+, and available P content at 90 days after seeding. Different alphabets indicate significant difference between means using Tukey's test at P ≤ 0.05. The error bars are the ± standard error of quadruplicates.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4419218&req=5

fig7: Treatments (C1: soil alone, C2: soil + complete fertilization, CHS1: soil + complete fertilization + 20 g rice straw compost + 2 g sawdust ash, CHS2: soil + complete fertilization + 40 g rice straw compost + 4 g sawdust ash, and CHS3: soil + complete fertilization + 60 g rice straw compost + 6 g sawdust ash) effect on soil pH, total titratable acidity, exchangeable H+, exchangeable Al3+, and available P content at 90 days after seeding. Different alphabets indicate significant difference between means using Tukey's test at P ≤ 0.05. The error bars are the ± standard error of quadruplicates.
Mentions: The treatments with the different rates of crude humic substances (CHS1, CHS2, and CHS3) significantly increased soil pH compared with C1 (soil alone) and C2 (normal fertilization) (Figure 7). Soil pH also increased with increasing rate of crude humic substances (CHS1 < CHS2 < CHS3) (Figure 7) due to the high pH and basic cations of the sawdust ash used in this study (Table 2). Soil total titratable acidity and exchangeable H+ were significantly lower in the crude humic substances treatments (CHS1, CHS2, and CHS3) compared with soil alone (C1) and normal fertilization (C2) (Figure 7). The high pH and basic cations of the sawdust ash (Table 2) in CHS1, CHS2, and CHS3 might have reduced soil titratable acidity and exchangeable H+. Soil alone treatment (C1) showed the highest total titratable acidity and exchangeable Al3+ compared with other treatments because some of the P fertilizer (ERP) in C2, CHS1, CHS2, and CHS3 might have reduced exchangeable Al3+ and total titratable acidity compared with soil alone (C1) as in acidic soils, hydroxides and oxides of Al3+ are precipitated by H2PO4− as variscite and various minerals of the plumbogummite group [14]. Available P in normal fertilization and crude humic substances (CHS1, CHS2, and CHS3) were statistically similar (Figure 7). However, the highest rate of crude humic substances (CHS3) showed higher available P compared with CHS2. The lower available P in CHS2 compared with CHS3 was due to the higher P uptake and recovery by rice plants under CHS2 as those under CHS3 died.

Bottom Line: A pot experiment was conducted to determine the effects of crude humic substances on rice plant growth, nutrients uptake, nutrients recovery, and soil chemical properties using an acid soil mixed with three rates of crude humic substances (20, 40, and 60 g pot(-1)).However, the lowest rate of crude humic substances (20 g pot(-1)) significantly improved total dry matter, nutrients uptake, nutrients recovery, and soil nutrients availability compared with crude humic substances (40 and 60 g pot(-1)) and the normal fertilization.Apart from improving growth of rice plants, crude humic substances can be used to ameliorate acid soils in rice cultivation.

View Article: PubMed Central - PubMed

Affiliation: Department of Crop Science, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia Bintulu Sarawak Campus, 97008 Bintulu, Sarawak, Malaysia.

ABSTRACT
High cation exchange capacity and organic matter content of crude humic substances from compost could be exploited to reduce ammonia loss from urea and to as well improve rice growth and soil chemical properties for efficient nutrients utilization in lowland rice cultivation. Close-dynamic air flow system was used to determine the effects of crude humic substances on ammonia volatilization. A pot experiment was conducted to determine the effects of crude humic substances on rice plant growth, nutrients uptake, nutrients recovery, and soil chemical properties using an acid soil mixed with three rates of crude humic substances (20, 40, and 60 g pot(-1)). Standard procedures were used to evaluate rice plant dry matter production, nutrients uptake, nutrients recovery, and soil chemical properties. Application of crude humic substances increased ammonia volatilization. However, the lowest rate of crude humic substances (20 g pot(-1)) significantly improved total dry matter, nutrients uptake, nutrients recovery, and soil nutrients availability compared with crude humic substances (40 and 60 g pot(-1)) and the normal fertilization. Apart from improving growth of rice plants, crude humic substances can be used to ameliorate acid soils in rice cultivation. The findings of this study are being validated in our ongoing field trials.

No MeSH data available.


Related in: MedlinePlus