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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.


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 selected soil exchangeable cations (K+, Ca2+, Mg2+, Na+, Cu2+, Zn2+, Fe2+, and Mn2+) 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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fig9: 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 selected soil exchangeable cations (K+, Ca2+, Mg2+, Na+, Cu2+, Zn2+, Fe2+, and Mn2+) 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 effects of the different treatments on selected exchangeable cations at 90 days of seeding are shown in Figure 9. The treatment with the highest rate of crude humic substances (CHS3) showed the highest soil exchangeable K+, Ca2+, Mg2+, Na+, Zn2+, and Mn2+ compared with other treatments due to less nutrients depletion in the soil as the rice plants died during this study. CHS1, CHS2, and CHS3 increased exchangeable Ca2+ and Zn2+ compared to normal fertilization (C2). The treatment with the lowest crude humic substances (CHS1) showed the highest exchangeable Cu2+ compared with other treatments because of antagonistic effect of Cu and Zn [62]. Soil exchangeable Fe2+ (CHS1 > CHS2 > CHS3) decreased with increasing rate of crude humic substances (CHS1 < CHS2 < CHS3) due to increase in soil pH (Figure 7) [63].


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 selected soil exchangeable cations (K+, Ca2+, Mg2+, Na+, Cu2+, Zn2+, Fe2+, and Mn2+) 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

fig9: 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 selected soil exchangeable cations (K+, Ca2+, Mg2+, Na+, Cu2+, Zn2+, Fe2+, and Mn2+) 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 effects of the different treatments on selected exchangeable cations at 90 days of seeding are shown in Figure 9. The treatment with the highest rate of crude humic substances (CHS3) showed the highest soil exchangeable K+, Ca2+, Mg2+, Na+, Zn2+, and Mn2+ compared with other treatments due to less nutrients depletion in the soil as the rice plants died during this study. CHS1, CHS2, and CHS3 increased exchangeable Ca2+ and Zn2+ compared to normal fertilization (C2). The treatment with the lowest crude humic substances (CHS1) showed the highest exchangeable Cu2+ compared with other treatments because of antagonistic effect of Cu and Zn [62]. Soil exchangeable Fe2+ (CHS1 > CHS2 > CHS3) decreased with increasing rate of crude humic substances (CHS1 < CHS2 < CHS3) due to increase in soil pH (Figure 7) [63].

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.