Limits...
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 (G1: 100% sand, G2: 5% rice straw compost + 95% sand, G3: 10% rice straw compost + 80% sand, and G4: 15% rice straw compost + 85% sand) effect on rice seeds germination rate, shoot elongation, root elongation, relative germination, relative shoot elongation, relative root elongation, and germination index of rice seedlings at 7 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 triplicates.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4419218&req=5

fig3: Treatments (G1: 100% sand, G2: 5% rice straw compost + 95% sand, G3: 10% rice straw compost + 80% sand, and G4: 15% rice straw compost + 85% sand) effect on rice seeds germination rate, shoot elongation, root elongation, relative germination, relative shoot elongation, relative root elongation, and germination index of rice seedlings at 7 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 triplicates.

Mentions: The effects of all the treatments on seed germination rate, relative germination, relative shoot elongation, relative root elongation, and germination index were statistically similar (Figure 3). Application of rice straw compost (G2, G3, and G4) showed no significant effects on seed germination rate and relative germination. However, rice straw compost (G2, G3, and G4) significantly reduced root elongation and shoot elongation compared with sand alone (G1) (Figure 3). Gallardo-Lara and Nogales [59] demonstrated that high N content in compost and compost rate can cause an inhibitory effect on seed germination and growth. Thus, this germination media test shows that the use of rice straw compost as a germination medium for rice seeds is not suitable. This is further supported by the lower germination index (less than 80%) of the rice seeds on G2, G3, and G4 [50]. In a related study, rice straw was transformed into soil-like substrate through aerobic fermentation and bioconversion using fungi and worms before using the product as a planting medium [60]. Hence, sand alone (G1) was used as germination medium for the rice seedlings production in our pot study.


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 (G1: 100% sand, G2: 5% rice straw compost + 95% sand, G3: 10% rice straw compost + 80% sand, and G4: 15% rice straw compost + 85% sand) effect on rice seeds germination rate, shoot elongation, root elongation, relative germination, relative shoot elongation, relative root elongation, and germination index of rice seedlings at 7 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 triplicates.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig3: Treatments (G1: 100% sand, G2: 5% rice straw compost + 95% sand, G3: 10% rice straw compost + 80% sand, and G4: 15% rice straw compost + 85% sand) effect on rice seeds germination rate, shoot elongation, root elongation, relative germination, relative shoot elongation, relative root elongation, and germination index of rice seedlings at 7 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 triplicates.
Mentions: The effects of all the treatments on seed germination rate, relative germination, relative shoot elongation, relative root elongation, and germination index were statistically similar (Figure 3). Application of rice straw compost (G2, G3, and G4) showed no significant effects on seed germination rate and relative germination. However, rice straw compost (G2, G3, and G4) significantly reduced root elongation and shoot elongation compared with sand alone (G1) (Figure 3). Gallardo-Lara and Nogales [59] demonstrated that high N content in compost and compost rate can cause an inhibitory effect on seed germination and growth. Thus, this germination media test shows that the use of rice straw compost as a germination medium for rice seeds is not suitable. This is further supported by the lower germination index (less than 80%) of the rice seeds on G2, G3, and G4 [50]. In a related study, rice straw was transformed into soil-like substrate through aerobic fermentation and bioconversion using fungi and worms before using the product as a planting medium [60]. Hence, sand alone (G1) was used as germination medium for the rice seedlings production in our pot study.

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.