Nitrogen mineralization in lowland rice soils: The role of organic matter quantity and quality

Sahrawat, K. L.

doi:10.1080/03650340903093158

Cited by 33 publications

(21 citation statements)

References 72 publications

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“…Recent research suggests that both organic matter quantity and quality are influenced by prolonged submergence , which in turn affects mineralization and nitrogen supply in wetland soils. While organic matter quantity increases following prolonged submergence of soil, submergence also changes the chemistry and quality of soil organic matter, which influences nitrogen mineralization (Sahrawat, 2010).…”

Section: Introductionmentioning

confidence: 99%

Inclusion of upland crops in rice‐based rotations affects chemical properties of clay soil

Linh

Sleutel

Elsacker

et al. 2015

Soil Use and Management

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In the Mekong Delta, alluvial clay soils have been used intensively over many generations for rice monoculture. Currently, farmers are confronted by problems of declining land productivity. Rotations comprising rice and upland crops can increase soil quality, but appropriate cropping systems for paddy soils have received relatively little attention. We therefore established a multiyear field experiment to evaluate the long-term effects of cropping systems with different rotations on soil chemical quality. Systems laid out in a randomized complete block design with four replications were as follows: (i) traditional rice monoculture with three rice crops per year (R-R-R), (ii) rotation with two rice crops and maize (R-M-R), (iii) rotation with two rice crops and mung bean (R-Mb-R) and (iv) rotation with one rice crop and two upland crops – mung bean and maize (R-Mb-M). We hypothesized that systems with rotations of upland crops and their temporary beds improve chemical quality of paddy rice soil. Soil chemical parameters were determined to better understand and evaluate the sustainability of the cropping systems. Results showed an improvement in soil chemical quality for cropping systems with rotations of rice and mung bean or maize grown on temporary beds (R-M-R, R-Mb-R and R-Mb-M), particularly the content of soil organic carbon and a presumed hydrolysable labile carbon fraction compared with rice monoculture. Less pronounced improvements in EC, CEC and total acidity were also found with inclusion of upland crops. Cropping systems of rice with upland crops improved rice grain and straw yield in subsequent season in contrast with rice monoculture

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Section: Introductionmentioning

confidence: 99%

Inclusion of upland crops in rice‐based rotations affects chemical properties of clay soil

Linh

Sleutel

Elsacker

et al. 2015

Soil Use and Management

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“…Soil infertility problems under aerobic conditions are a consequence of the depletion of soil organic matter and N as well as the unavailability of micronutrients such as Mn, Fe, and Zn in calcareous soils, resulting in nutrient disorders and imbalances. The flooded conditions favor production and accumulation of NH 4 –N that is readily converted to NO 3 –N under aerobic conditions and is prone to losses (Sahrawat, 2012; Sahrawat, 2010). According to Belder et al (2005a), the amount of unaccounted for N was higher under aerobic conditions than under flooded conditions.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen Use and Crop Performance of Rice under Aerobic Conditions in a Semiarid Subtropical Environment

et al. 2014

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Aerobic rice (Oryza sativa L.) is gaining in popularity across South Asia, mainly because it saves water and labor. Under warm (sub) tropical conditions of this region, this unconventional system aimed at improved resource use e ciency is still in the development phase. We tested crop performance and N uptake of three local genotypes in relation to di erent water and N supply rates under aerobic conditions at the research station of the University of Agriculture, Faisalabad, Pakistan. In eld experiments during 2009 to 2010, covering two rice seasons, three irrigation levels (high, moderate, and low), three N rates (0, 170, and 220 kg N ha -1 ), and three genotypes (KSK133, IR6, and RSP1), crop performance and total N uptake (TNU) were strongly in uenced by irrigation and di ered among genotypes. At the highest level of irrigation, genotype KSK133 performed better than RSP1 and IR6, resulting in an accumulated aboveground biomass of 13 Mg ha -1 and a grain yield of 5 Mg ha -1 . e TNU ranged from 34 to 126 kg ha -1 in 2009 and from 52 to 123 kg ha -1 in 2010. For all genotypes, we observed a strong positive correlation between TNU and grain yield. Surprisingly, the N application rate did not in uence TNU, but the high irrigation regime increased TNU. e limited response to N application suggests signi cant losses of the applied N. is highlights the need for careful N management in aerobic rice systems; N application should match periods of su cient soil moisture availability and the greatest crop N demand.

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“…The higher soil residual mineral N levels found in our study with the PM+IPNS treatment might be due to slow release of the N during the crop growth period. Mineralizable N is affected by the quantity and quality of organic matter applied in the soil [64] which might be cause of variation in mineralizable N in PM and CD treated soils. Sahrawat [33] reported that mineralizable N in anaerobic incubation was significantly and positively correlated with soil OC and total N. This might be the reason of higher mineralizable N in manure treated soils in our study which contained higher total N and OC (Figs.…”

Section: Mineralizable Nmentioning

confidence: 99%

Long Term Effects of Integrated Plant Nutrition System on Rice Yield, Nitrogen Dynamics and Biochemical Properties in Soil of Rice-rice Cropping System

Sarkar

Jahan

Haque

et al. 2019

AJSSPN

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Long term fertilization from manure and fertilizer influences crop yield as well as soil nutrient cycling. Therefore, a field experiment was conducted from 2010 to 2014 in order to observe the long term effects of integrated application of manure and fertilizers on rice yield, soil nitrogen dynamics and soil biochemical properties. The field experiment was carried out in a rice-fallow-rice cropping pattern under wetland condition with four fertilizer management practices: NPKS fertilizer as soil test based (STB), Cow dung (CD) @ 3 t ha-1 + NPKS as integrated plant nutrition system (IPNS) [CD+IPNS], Poultry manure (PM) @ 2 t ha-1 + NPKS as IPNS [PM+IPNS] and N control. The rice grain yield, soil N dynamics and the biochemical properties assessed in our study significantly varied with the organic sources used in IPNS system. The annual grain yield of double cropped rice with PM+IPNS was similar to the STB treatment over the five cropping years while CD+IPNS responded from the third year. After five years of rice cropping PM+IPNS showed better impact on soil nitrogen dynamics and biochemical properties compared to STB fertilizer management. Considering the soil health, our study suggests that PM+IPNS could be a good practice for sustainable rice production in long run reducing the use of chemical fertilizer.

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Nitrogen mineralization in lowland rice soils: The role of organic matter quantity and quality

Cited by 33 publications

References 72 publications

Inclusion of upland crops in rice‐based rotations affects chemical properties of clay soil

Inclusion of upland crops in rice‐based rotations affects chemical properties of clay soil

Nitrogen Use and Crop Performance of Rice under Aerobic Conditions in a Semiarid Subtropical Environment

Long Term Effects of Integrated Plant Nutrition System on Rice Yield, Nitrogen Dynamics and Biochemical Properties in Soil of Rice-rice Cropping System

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