Potassium Uptake and Recovery by an Upland Rice‐Soybean Rotation on an Oxisol

Gill, D. W.; Kamprath, E. J.

doi:10.2134/agronj1990.00021962008200020031x

Cited by 11 publications

(15 citation statements)

References 2 publications

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“…Rice straw contains approximately 80% of the above ground plant K and can amount to over 150 kg K ha -1 (Dobermann et al 1996Dobbermann and Fairhurst 2000). Straw removal therefore exacerbates K deficiency problems and has been cited as the major cause of K deficiencies in irrigated rice fields throughout Asia (De Datta 1981;Gill and Kamprath 1990;Dobermann et al 1998).…”

Section: Yield Response To Organic Residues Alonementioning

confidence: 99%

Benefits of organic residues and chemical fertilizer to productivity of rain-fed lowland rice and to soil nutrient balances

Linquist

Phengsouvanna

Sengxue

2007

Nutr Cycl Agroecosyst

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Low yields and high risk characterize many rain-fed lowland rice environments, including those in Laos. Drought and fluctuating soil-water conditions (from aerobic to anaerobic states) can limit productivity and the efficient use of applied nutrients. Although addition of organic matter may improve the efficiency of fertilizer use, on-farm residues, for example farmyard manure (FYM), rice straw and rice hulls, are, currently, poorly utilized in these systems. Single and multi-year experiments were designed to evaluate the effect of these residues on rice productivity and efficiency of fertilizer use at four sites. Rice yield without fertilizer but with addition of residues ranged from 1.1 to 1.7 t ha -1 across sites and years. In response to fertilizer, yields increased on average by 1.4 t ha -1 . For all sites and years there was a significant response of yield to organic residues applied without fertilizer, with responses ranging from 0.2 to 1.4 t ha -1 . In 58% of cases there was no residue·fertilizer interaction (benefits of residues when applied with fertilizer were additive). In 38 and 4% of cases the interaction was negative (no response to residues if fertilizer was already applied) or positive (synergistic), respectively. In the multi-year studies, the type of interaction varied between years, suggesting that seasonal events, rather than soil type, determine the type of interaction. The greatest benefits of applying organic and chemical fertilizers together were observed in years when soil-water conditions were unfavorable (fluctuating anaerobic-aerobic conditions). The longterm effects of these different management strategies on soil nutrient balances suggest that N, P, and K balances were maintained as a result of balanced commercial fertilizer management but that addition of residues further enhanced these balances. All residues, when applied alone, resulted in positive soil Si balances; only with FYM were long-term N, P, and K balances maintained or positive, however. For resource-poor farmers, applying on-farm residues can be a sustainable approach to increasing productivity.

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Section: Yield Response To Organic Residues Alonementioning

confidence: 99%

Benefits of organic residues and chemical fertilizer to productivity of rain-fed lowland rice and to soil nutrient balances

Linquist

Phengsouvanna

Sengxue

2007

Nutr Cycl Agroecosyst

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“…IC CATIONS are usually low in the highly weathered, acid soils of the humid tropics and replenishing the soil cation pool with lime and fertilizers is relatively costly. Improperly managed agricultural systems result in the inefficient use or loss of soil cations through excessive removal in biomass and from leaching losses (Gill and Kamprath, 1990;Wong et al, 1992). In some cases, base cation leaching is desirable when the depth of rooting of Al-sensitive crops is limited by a high Alsaturated subsoil.…”

Section: B~smentioning

confidence: 99%

“…The amount of cumulative rainfall and drainage has been related to the decrease in surface-soil cations (Cahn et al, 1993;Ayarza et al, 1991 ). Significant leaching losses are likely to occur only if the soil ion exchange capacity is exceeded, as when large amounts of cations are added in fertilizers (Friesen et al, 1982;Gill and Kamprath, 1990). Cropped plots reportedly showed reduced cation leaching as compared with bare plots, presumably because of the effect of plants on soil drying (reducing drainage) and nutrient recycling (Wong et al, 1992).…”

mentioning

confidence: 99%

Water and Cation Movement in an Indonesian Ultisol

Dierolf

Arya²,

Yost

1997

Agronomy Journal

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Lime and fertilizer are required to overcome acidity and soil fertility constraints to crop production in the highly weathered soils of Sitiung, Indonesia. The potential leaching of soil amendments is enhanced by the high annual rainfall of 2750 mm and the low effective cation exchange capacity (ECEC) of these soils. The purpose of this study was to understand the relationship of soil water hydrology to the fate of applied soil amendments. Internal soil water drainage (fieldmeasured) and soil moisture release curves (field‐ and laboratorymeasured) were determined to characterize the soil hydraulic properties of a clayey, kaolinitic, isohyperthermic Typic Kanhapludult. The results indicated that 6 h after the application of 72.5 mm of water during a 100‐min period, water equivalent to nearly 94% of the applied water drained to depths below 112.5 cm. Macropore volume accounted for 26 to 40% of the total porosity of the top 22.5 cm of soil and 5 to 7% in the 22.5‐ to 112.5‐cm depth. Cation movement was measured during a 2‐yr period in a field experiment that examined the effects of various rates and timing of K fertilization (and blanket applications of Ca and Mg) and stover removal on soil K, Ca, and Mg pools. Results show that amounts equivalent to 1% of the K, 5% of the Ca, and 24% of the Mg that were applied as fertilizer nutrients accumulated in the 30‐ to 90‐cm depth. An average of 33% of the K, 26% of the Ca, and 8% of the Mg applied as fertilizers were not accounted for in the soil or by crop biomass and probably leached below the 90‐cm depth. We conclude that is difficult to chemically ameliorate the subsoil below the 30‐cm depth and hypothesize that macropore flow through the soil and a continually wet subsoil are the major factors limiting subsoil cation accumulation.

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“…Evidence has clearly shown the positive residual impact of straw incorporation on the K fertility status of agricultural soils (Cox and Uribe, 1992;Allison et al, 1997;Wihardjaka et al, 1999;Dierolf and Yost, 2000). In particular, straw management plays a critical role in the K fertility status of rice soils since it contains about 80% of the above ground plant K (Dobermann et al, 1996(Dobermann et al, , 1998Dobermann and Fairhurst, 2000) and its removal has been cited as the major culprit of K deficiencies in irrigated rice fields throughout Asia (De Datta, 1981;Gill and Kamprath, 1990;Dobermann et al, 1998). Potassium deficiency are a potential problem in all intensive irrigated rice systems and is common on coarse textured soils, where rice straw is removed and where there is little K in irrigation water (Dobermann et al, 1996).…”

mentioning

confidence: 99%