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Silicon fertilization to sugarcane: influence on yield, technological quality and stalk borer and rust incidence

Abstract

The importance of sugarcane to Brazil, which is the biggest world producer, is undeniable for income, employments and sustainable energy. Sugarcane presents high silicon absorption, which is an element with low content in most of tropical soils, specially sandy and silty loam soils. These soils types are located in major of Sao Paulo expansion zones of sugarcane. Silicate use in these soils could increase yield, drought tolerance and reduce damages caused by pests and diseases, but there is few studies about this subject in Brazil, specially about residual effects. The objective will be evaluate yield, technological quality, stalk borer and rust incidence in sugarcane ratoon cultivated in soils with silicon application at planting. The first study will be done at sugarcane ratoon (2o cycle) in pots (100 L) in randomized completely blocks, 4 replications with 3 soils (sandy, silty loam and clay), 4 rates of silicon (0, 185, 370 e 555 kg ha-1 Si). The second study will be conducted during September,2009 and 2010 in 1º crop of sugarcane cultivated at pots in 3 soils (sandy, silty loam and clay), 2 rates of silicon (0 e 555 kg ha-1 Si) to evaluation of phenolic composts accumulation and anatomical or structural modifications on leaves +1 (top visible dewlap) before and after rust inoculation. The third study will be done in field conditions at sugarcane ratoon (2o cycle) in completely randomized blocks, 2 soils with low Si content, 4 rates (0, 55, 110 e 165 kg ha-1 Si), 2 cultivars (IAC 87 3396; SP 89 1115) and 4 replications. It will be done evaluations of rust incidence during 4 months. After harvest of sugarcane plots, will be done chemical analysis for soil fertility and Si content in soils by 2 extractants (acetic acid 0.5 Mol L-1 and CaCl2 0.01 mol L-1) and evaluation of productivity, technological quality, damage of borer stalk and silicon contents of leaves +1 and stems and leaves at harvest. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CAMARGO, MONICA SARTORI; KEEPING, MALCOLM G.. Silicon in Sugarcane: Availability in Soil, Fertilization, and Uptake. SILICON, v. 13, n. 10, p. 3691-3701, . (06/06288-2, 08/10795-2, 18/05843-0, 13/04144-7)
CAMARGO, MONICA SARTORI; COUTINHO, ISABEL D.; LOURENCO, SILVIA A.; SOARES, MARLI K. M.; COLNAGO, LUIZ A.; APPEZZATO-DA-GLORIA, BEATRIZ; CAVALHEIRO, ALBERTO J.; AMORIM, LILIAN. Potential prophylactic role of silicon against brown rust (Puccinia melanocephala) in sugarcane. European Journal of Plant Pathology, v. 157, n. 1, . (08/10795-2, 18/05843-0)
CAMARGO, MONICA SARTORI; ROCHA, GABRIELA; BALTIERI, GUSTAVO JONAS. Silicate Fertilization in Sugarcane: Silicon Availability, Uptake, and Recovery Index Over Two Consecutive Cycles. JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION, v. 21, n. 3, . (08/10795-2, 18/05843-0, 06/06288-2)

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