Search

The experiment was conducted in the crop rotation of winter wheat, maize, spring barley, and winter rapeseed in the Albic Retisol from 2012 to 2019. During the experiment, crop by-products were left in the field annually as a common background for each treatment. Before the beginning of the experiment in 2011, dolomite lime was applied at three different doses based on the hydrolytic acidity (Hh) of the soil. Recommended fertiliser doses were applied to the crops with the average annual application of N112P36K87 per unit area. The experiment included the following treatments: 1) without fertilisers, when only crop by-products were incorporated into the soil (control), 2) N112P36K87, 3) NPK + CaMg(CO3)2 (0.5 Hh), 4) NPK + CaMg(CO3)2 (1.0 Hh), and 5) NPK + CaMg(CO3)2 (1.5 Hh). Analysis of crop yield and the phosphorus (P) uptake by plant parts allowed to determine the level of P return with crop by-products using the Partial Nutrient Balance Intensity (PNBI) index. In the experiment, a negative PNBI was observed, when only crop by-products were incorporated into the soil (control treatment) or removed from the field, and all other treatments showed positive indices. The PNBI index increased by 1.7-2.8 times compared to the treatment, when by-products were removed. This result suggests that returning of crop by-products to the soil can be an alternative source of phosphorus. The results of the experiment determined the accumulation of total phosphorus (Ptot) and changes in the distribution of phosphorus due to the addition of NPK and CaMg(CO3)2 together with the by-products returned to the soil. Significant increases in organic (Porg), inorganic (Pinorg), and available (Pavail) P content indicate the accumulation of both phosphorus reserves and its available forms in acid soil. The use of mineral fertilisers and dolomite lime in combination with crop by-products is an effective approach to improve crop productivity and phosphate level in the soil. [ABSTRACT FROM AUTHOR]

Copyright of Indonesian Journal of Agricultural Sciences / Jurnal Ilmu Pertanian Indonesia is the property of IPB University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Jurnal Pertanian is the property of Universitas Djuanda and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Jurnal Pertanian is the property of Universitas Djuanda and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Many forest soils are acidic and have very low plant-available pools of magnesium. Past and present sylvicultural, nutritional and/or climatic pressures endured by forest ecosystems can result in net losses of nutrients and ecosystem function losses. Liming with a carbonate product is an alternative to counteract these degradations but the effects of liming on the biogeochemical cycling of nutrients over time and the dynamics of Mg released from liming products are still unclear. We studied the Mg isotopes composition in four paired-treatment experimental beech forest ecosystems in northern France. At the sites where dolomitic lime was applied, the variation in exchangeable and foliar δ26Mg demonstrated the direct contribution of dolomite-derived Mg to the replenishment of topsoil exchangeable pools and to tree nutrition improvement: dolomite-derived Mg was incorporated into the biological cycling which allows its retention on the mid to long term in the soil–plant system. At the sites limed with calcium carbonate, the changes in exchangeable and foliar Mg contents and δ26Mg observed on the long term suggest that the applied product contained a small amount of Mg and/or that Mg cycling changed after liming, to cope in particular with the low Mg availability. Lastly, our results highlight the high δ26Mg of the organic layer (humus): fractionation processes occurring within this layer (mineralization/ageing of organic matter, preferential retention of 26 Mg) could explain these singular signatures that could greatly influence the topsoil Mg exchangeable pools. [ABSTRACT FROM AUTHOR]

Copyright of Agro Productividad is the property of Colegio de Postgraduados and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Temas Agrarios is the property of Universidad de Cordoba and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)