Nutrient budgets: sustainability assessment of rainfed lowland rice-based systems in northeast Thailand

Wijnhoud, J. D.; Konboon, Yothin; Lefroy, R. D. B.

doi:10.1016/s0167-8809(03)00180-4

Cited by 52 publications

(31 citation statements)

References 8 publications

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“…Significant gains in the efficiency of N recovery can be made when plant material of slower decomposition rates is added to highly decomposable green manure materials. Wijnhoud et al (2003) found that adding rice straw to the green manure Aeschynomene afraspera, which is used as a green manure crop for flooded paddy rice, increased the N recovery efficiency in a subsequent rice crop from 29 to 50 %. If smallholder farmers intend to use M. pruriens on maize as an N source, removing and storing the green manure plant residues during the wet season and adding them to the germinating maize mixed with maize stover or other low quality organic residues is likely to improve N recovery and increase soil organic matter contents over the longer term.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Tracking the Release of Soil Nitrate and Labile C in A Legume-Maize Rotation in Zimbabwe

Jiri¹,

Mafongoya²

2017

SAR

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This study compared the effect of a weedy fallow (5.2 t/ha biomass), a velvet bean (Mucuna pruriens) cut for hay (7.2 t/ha biomass) and a green-manured M. pruriens (6.49 t/ha biomass) on the dynamics of soil N and C in a maize crop. An on-farm, farmer participatory experiment was established on a farmer's field in Wedza District, Zimbabwe. Soil mineral N and labile carbon were determined at intervals upto 120 cm depth, at maize planting and at 1 and 2 weeks after planting. Before planting, the soil mineral N content ranged from 28 kg N/ha after weed fallow to 107 kgN/ha following M. pruriens. Total nitrate concentration was highest in the 0-15 cm depth of the M. pruriens treatments in the pre-planting sampling, but following rainfall and maize planting, nitrate concentration declined rapidly. By 2 weeks after planting, 7.5 and 13.5 kg N/ha remained in the 0-120 cm soil depth of the weedy fallow and green-manured M. pruriens, respectively. Improving synchrony of nutrient release and uptake is critical when applying high quality residues which breakdown relatively slowly. This could result in significant inputs of C, release nutrients more slowly and reduce soil nutrient losses.

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Section: Conclusion and Recommendationsmentioning

confidence: 99%

Tracking the Release of Soil Nitrate and Labile C in A Legume-Maize Rotation in Zimbabwe

Jiri¹,

Mafongoya²

2017

SAR

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“…DEA is a non-parametric method to measure the TE and productivity of decision-making units (DMUs) according to multiple inputs and outputs (Hadad, Friedman, Sinuany-Stern, & Ben-Yair, 2008;Sexton, 1986). Previous studies have reported that the basic factors of production, such as, land, labor and capital have been considered as assessment parameters of sustainable development (Longpichai, Lefroy (2003) found that the inputs and outputs variables are important socio-economic factors and impact on the long-term sustainability. Thus, the measurement of efficiency score depends on inputs and outputs variables, which is consistent with numerous studies.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Technical Efficiency of Durian Production in Thailand: An Application of Data Envelopment Analysis Approach

Parichatnon

Maichum

Peng

2017

IRAJMSS

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“…This study analysed N and P partial budgets in a weedy fallow, a velvet bean hay crop and a ploughed in or green manure velvet bean system (all followed by maize), using an approach based on nutrient balance or 'book-keeping' (Wijnhoud, Konboon, & Lefroy, 2003). The resulting nutrient balances are therefore partial balances and basically show what farmers take out of the system and what they add or put back.…”

Section: Introductionmentioning

confidence: 99%

Partial Nutrient Balances in Tropical Velvet Bean-Maize System in Zimbabwe

Jiri¹,

Mafongoya²

2017

JAS

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In a field experiment on legume-maize cropping sequence, the effect of nitrogen and phosphate fertiliser application on nutrient budgeting after a two year cropping cycle was studied. The results of this work showed that partial nutrient balances can give an indication about the sustainability of a system unless a full stock of all the nutrients is known. It is also clear from these results that there would unlikely be a carryover of N to the next season, probably due to leaching of N from the top soil. Positive partial P balances would, on the other hand, be of residual value. However, it should be noted that the positive partial P balances were only observed where maize yield was low. The long-term perspectives of a crop production system cannot be assessed solely on the basis of partial nutrient balances. The nutrient stock: balance ratio may be a better indicator of sustainability, giving a more accurate indication of how long farming can continue in the same way, given the available nutrients. These points towards taking a fresh look at the existing recommended application rates for maize crops.

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Nutrient budgets: sustainability assessment of rainfed lowland rice-based systems in northeast Thailand

Cited by 52 publications

References 8 publications

Tracking the Release of Soil Nitrate and Labile C in A Legume-Maize Rotation in Zimbabwe

Tracking the Release of Soil Nitrate and Labile C in A Legume-Maize Rotation in Zimbabwe

Measurement of Technical Efficiency of Durian Production in Thailand: An Application of Data Envelopment Analysis Approach

Partial Nutrient Balances in Tropical Velvet Bean-Maize System in Zimbabwe

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