Do organic amendments improve yield trends and profitability in intensive rice systems?

Dawe, D.; Dobermann, A.; Ladha, J. K.; Yadav, R. P.; Lin, Bo; Gupta, Raj Kumar; Lal, Pyare; Panaullah, G. M.; Sariam, O.; Singh, Yadvinder; Swarup, Anand; Zhen, Qi

doi:10.1016/s0378-4290(03)00074-1

Cited by 160 publications

(85 citation statements)

References 17 publications

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“…The average yield increase of combining organics and fertilizers on wheat, maize and rice was found to be 8 % compared to using only fertilizers. In a different case however, (Dawe et al 2003) found no improvement in grain yield trends with application of either manure or straw in intensive rice systems.…”

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confidence: 80%

Do organic inputs matter – a meta-analysis of additional yield effects for arable crops in Europe

et al. 2016

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Background and aims Organic inputs have a positive effect on the soil organic matter balance. They are therefore an important asset for soil fertility and crop growth. This study quantifies the additional yield effect due to organic inputs for arable crops in Europe when macronutrients are not a limiting factor. Methods A meta-analysis was performed using data from 20 long-term experiments in Europe. Maxima of yield response curves to nitrogen were compared, with and without organic inputs, under abundant P and K supply. Results We were surprised to find that, across all experiments, the mean additional yield effect of organic inputs was not significant (+ 1.4 % ± 1.6 (95 % confidence interval)). In specific cases however, especially for root and tuber crops, spring sown cereals, or for very sandy soils or wet climates, organic inputs did increase attainable yields. A significant correlation was found between increase in attainable yields and increase in soil organic matter content. Conclusions Aggregating data from 20 long-term experiments in Europe, this study shows that organic inputs and/ or soil organic matter do not necessarily increase yields, given sufficient nutrients are supplied by mineral fertilisers. Results show the relevance of some environmental factors for additional yield effect of organic inputs, but no simple relation between organic inputs and crop growth.

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confidence: 80%

Do organic inputs matter – a meta-analysis of additional yield effects for arable crops in Europe

et al. 2016

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“…Dawe et al 3 analyzed yield trends in 7 long-term experiments in Asia, with the rice cultivated twice a year, and concluded that the application of manure or straw failed to improve yield trends. The results of our present study contradict this conclusion.…”

Section: Discussionmentioning

confidence: 99%

Combined Effects of the Continual Application of Composted Rice Straw and Chemical Fertilizer on Rice Yield under a Double Rice Cropping System in the Mekong Delta, Vietnam

Watanabe

Luu

Nguyen

et al. 2013

JARQ

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We conducted a 12-year field experiment to study the combined effects of rice straw compost and chemical fertilizer application on a double rice cropping system in the Mekong Delta, Vietnam and established 7 treatments using a randomized block design with 3 replications. We calculated the yields of treatments relative to those of conventionally fertilized plots (i.e. with no added rice straw compost), and analyzed their annual trends. In the plots with rice straw compost, we observed a positive trend over 12 continuous wet cropping seasons. In comparison with conventional fertilization, the application of rice straw compost with reduced chemical fertilizer can maintain rice productivity over a longer period. We analyzed the nutrient status of the rice straw at harvest over 4 cropping seasons and observed that the Si concentration of the rice straw in conventionally fertilized plots was significantly lower than that in the plots where rice straw compost was applied. The N, P and Mg concentrations of the rice straw increased with the fertilizer application rate, while the concentrations of K, Ca, Mn, Fe, Zn, and Cu did not differ significantly among treatments. Our results suggest that continuous removal of rice straw may reduce the Si availability in soil, thereby decreasing rice productivity. In addition, we verified that rice straw compost can be an effective source of silicon for paddy rice.

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“…Long-term straw incorporation in temperate areas can increase the reservoirs of readily mineralized organic N, suggesting potential aft er several years for reducing fertilizer N rates for optimal rice yield Eagle et al, 2001;Linquist et al, 2006). Long-term applications of straw, however, do not improve the trends in rice yield in tropical rice systems with two rice crops per year and high inputs of fertilizer N (Dawe et al, 2003). The retention of crop residue is not essential for maintaining soil C and INS in continuous rice cultivaton with soil submergence.…”

Section: Crop Residue and Green Manure Managementmentioning

confidence: 99%

Nitrogen Transformations in Submerged Soils

Buresh

Reddy

Kessel

2015

Agronomy Monographs

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Soils with continuous or intermitt ent submergence by water are widely distributed worldwide. They occur in a range of ecosystems including rice (Oryza sativa L.) fi elds, wetlands, estuaries, and fl oodplains. Such ecosystems oft en occur at low elevation in the landscape and are poorly drained with high retention of water. In addition, some upland areas with poor drainage can undergo periodic submergence and soil saturation. Moreover, the sediments in ocean, lake, and stream bottoms have similar biogeochemical and physical characteristics and N transformations as submerged agricultural soils.Rice fi elds surrounded by earthen levees to retain rain and irrigation water and ensure soil submergence are one of the world's major agricultural ecosystems. Rice is a staple food for nearly half the world's population, and about 95% of the global rice production occurs on fi elds with soil submerged during at least part of the rice-cropping period. The sustained productivity of this rice ecosystem, which ensures production of suffi cient food for a growing world population, relies heavily on the input and management of N.Nitrogen transformations in submerged soils are markedly diff erent from those in drained, aerated soils. These diff erences aff ect the prevalent soil microorganisms and microbial activities and the turnover, availabilility, and losses of N. To deal with the diff erences in N transformations between submerged and drained soils it is necessary to understand the biogeochemical conditions existing in submerged soils. This chapter is an update of an earlier review by Patrick (1982).

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Do organic amendments improve yield trends and profitability in intensive rice systems?

Cited by 160 publications

References 17 publications

Do organic inputs matter – a meta-analysis of additional yield effects for arable crops in Europe

Do organic inputs matter – a meta-analysis of additional yield effects for arable crops in Europe

Combined Effects of the Continual Application of Composted Rice Straw and Chemical Fertilizer on Rice Yield under a Double Rice Cropping System in the Mekong Delta, Vietnam

Nitrogen Transformations in Submerged Soils

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