Electronic Resource
Biochar increases plant-available water in a sandy loam soil under an aerobic rice crop system
| العنوان: | Biochar increases plant-available water in a sandy loam soil under an aerobic rice crop system |
|---|---|
| المؤلفون: | de Melo Carvalho, M.T., de Holanda Nunes Maia, A., Madari, B.E., Bastiaans, L., van Oort, P.A.J., Heinemann, A.B., Soler da Silva, M.A., Petter, F.A., Marimon-Junior, B.H., Meinke, H.B. |
| المصدر: | ISSN: 1869-9510 |
| بيانات النشر: | 2014 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The main objective of this study was to assess the impact of biochar rate (0, 8, 16 and 32 Mg ha-1) on the water retention capacity (WRC) of a sandy loam Dystric Plinthosol. The applied biochar was a by-product of slow pyrolysis (~450 °C) of eucalyptus wood, milled to pass through a 2000 µm sieve that resulted in a material with an intrinsic porosity =10 µm and a specific surface area of ~3.2 m2 g-1. The biochar was incorporated into the top 15 cm of the soil under an aerobic rice system. Our study focused on both the effects on WRC and rice yields 2 and 3 years after its application. Undisturbed soil samples were collected from 16 plots in two soil layers (5–10 and 15–20 cm). Soil water retention curves were modelled using a nonlinear mixed model which appropriately accounts for uncertainties inherent of spatial variability and repeated measurements taken within a specific soil sample. We found an increase in plant-available water in the upper soil layer proportional to the rate of biochar, with about 0.8% for each Mg ha-1 biochar amendment 2 and 3 years after its application. The impact of biochar on soil WRC was most likely related to an effect in overall porosity of the sandy loam soil, which was evident from an increase in saturated soil moisture and macro porosity with 0.5 and 1.6% for each Mg ha-1 of biochar applied, respectively. The increment in soil WRC did not translate into an increase in rice yield, essentially because in both seasons the amount of rainfall during the critical period for rice production exceeded 650 mm. The use of biochar as a soil amendment can be a worthy strategy to guarantee yield stability under short-term water-limited conditions. Our findings raise the importance of assessing the feasibility of very high application rates of biochar and the inclusion of a detailed analysis of its physical and chemical properties as part of future investigations. |
| مصطلحات الفهرس: | fertility, hydraulic conductivity, management, model, productivity, retention, temperatures, tropics, upland rice, Article/Letter to editor |
| URL: | |
| الاتاحة: | Open access content. Open access content https://creativecommons.org/licenses/by/4.0 Wageningen University & Research |
| ملاحظة: | application/pdf Solid Earth 5 (2014) ISSN: 1869-9510 ISSN: 1869-9510 English |
| Other Numbers: | NLWUP oai:library.wur.nl:wurpubs/479976 https://research.wur.nl/en/publications/biochar-increases-plant-available-water-in-a-sandy-loam-soil-unde 10.5194/se-5-939-2014 1236089860 |
| المصدر المساهم: | WUR STAFF PUBNS From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1236089860 |
| قاعدة البيانات: | OAIster |
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