Chemistry of Lowland Rice Soils and Nutrient Availability

Fageria, N. K.; Carvalho, Glaucilene Duarte; Santos, A. B. dos; Ferreira, Enderson Petrônio de Brito; Knupp, A. M.

doi:10.1080/00103624.2011.591467

Cited by 149 publications

(120 citation statements)

References 28 publications

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“…Já as alterações de caráter químico resultam no processo de autocalagem, decorrente do processo de redução do solo (Vahl, 1999). Consequentemente, o pH é elevado para uma condição mais favorável de crescimento, o que favorece a disponibilização de nutrientes (Fageria et al, 2011). Além disso, a água tem papel termorregulador nesse sistema, pois evita quedas ou elevações acentuadas de temperatura (Figura 1).…”

Section: Resultsunclassified

Desempenho de cultivares de arroz com uso de reguladores de crescimento, em diferentes sistemas de cultivo

Grohs

Marchesan

Roso

et al. 2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito de reguladores de crescimento sobre o estabelecimento inicial e o desempenho agronômico de cultivares de arroz irrigado, em diferentes sistemas de cultivo. O experimento foi conduzido em ambiente controlado e em campo, com as cultivares Irga 424 e Irga 425, e os produtos ácido giberélico, tiametoxam e Haf Plus. Em campo, os tratamentos foram testados nos sistemas de cultivo convencional e pré-germinado. Em ambiente controlado, as substâncias avaliadas promoveram a germinação de Irga 425, com incremento de 50% na germinação com o uso de tiametoxam, e de 39% com Haf Plus e ácido giberélico. Em campo, esse desempenho foi dependente do sistema de cultivo e da cultivar utilizada. O ácido giberélico causou estiolamento inicial, com reflexos na estatura da planta, na emissão de perfilhos e na deposição de biomassa vegetal. Tiametoxam e Haf Plus estimularam o perfilhamento das cultivares de arroz, nos dois sistemas de cultivo. Apesar de todos os produtos estimularem o número de panículas por metro quadrado, sua influência na produtividade de grãos não foi observada nos sistemas avaliados.Termos para indexação: Oryza sativa, ácido giberélico, estabelecimento inicial, sistema pré-germinado, tiametoxam. Performance of rice cultivars with the use of growth-regulators in different cropping systemsAbstract -The objective of this work was to evaluate the effect of growth-regulating substances on initial establishment and agronomic performance of irrigated rice cultivars, in different cropping systems. The experiment was carried out in controlled environment and in field conditions, using the cultivars Irga 424 and Irga 425, and the products gibberellic acid, thiamethoxam and Haf Plus. At field, treatments were tested with conventional and pre-germinated sowing systems. In the controlled environment, the evaluated substances promoted the germination of Irga 425, with an increase of 50% in germination with the use of thiamethoxam and of 39% with Haf Plus and gibberellic acid. In the field, this performance was dependent on the system and the cultivar used. Gibberellic acid caused initial blanching, which reflected in plant height, tiller emission, and deposition of vegetal biomass. Thiamethoxam and Haf Plus stimulated tillering of rice cultivars in both cultivation systems. Although all the products stimulated the number of panicles per square meter, there is no influence on grain yield in the evaluated systems.Index terms: Oryza sativa, gibberellic acid, early establishment, pre-germinated system, thiamethoxam. IntroduçãoAlém do estresse causado por baixas temperaturas, o estabelecimento das plântulas de arroz (Oryza sativa L.) pode ser afetado por diversos outros fatores. Características intrínsecas de cada genótipo de arroz podem condicionar plântulas mais ou menos vigorosas, o que está associado a balanços hormonais. Porém, a atuação do ambiente sobre a semente também é de grande importância.No sistema pré-germinado, é comum o acamamento das plantas, o que pode ser agrav...

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Section: Resultsunclassified

Desempenho de cultivares de arroz com uso de reguladores de crescimento, em diferentes sistemas de cultivo

Grohs

Marchesan

Roso

et al. 2012

Pesq. agropec. bras.

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“…Aerobic soil condition observed in AR could decrease the solubility of Si (Winslow, 1995) which could reduce rice Si uptake. Meanwhile the soil in IT treatment repeatedly experienced submerged condition which increases soil Si availability (Fageria et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Influence of Water Management and Silica Application on Rice Growth and Productivity in Central Java, Indonesia

Siregar¹,

Sipahutar²,

Husnain³

et al. 2016

JAS

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Rice cultivation in our study site at Central Java, Indonesia, is constrained by water scarcity and blast disease problems. A field experiment was thus conducted to evaluate the effect of water management and silicon (Si) application (with 500 kg ha -1 of silica gel) on improving rice growth and productivity and blast disease infection in Jakenan, Central Java. Split plot in randomized complete block design with 4 replications was used. The results showed that two water saving methods, intermittent (IT) and aerobic rice (AR) increased rice yield compared to conventional flooding water management. Further, IT showed better root growth and hence lodging resistance and decreased blast disease infection. IT had higher yield potential compared to AR although the yield of IT and AR were not statistically different. Si application gave significant effect on reducing leaf and neck blast infection and also increased stomata density (p < 0.01) in all water treatments. Si application did not result in increased yield but exhibited potential towards improving rice plant growth and production. Since Si fertilizer was never used in rice cultivation in Indonesia, the study reveals that IT combine with Si application was a suitable management for rice production in dry season in water limited Central Java region.

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“…Dobermenn dan Fairhurst [32] menyatakan bahwa rujukan standar kecukupan hara untuk konsentrasi fosfat optimum pada tanaman padi adalah > 0,18%. Bila dibandingkan dengan nilai rujukan standar ini maka kandungan P pada tanaman percobaan telah memasuki status kecukupan -hara optimum untuk tanaman.…”

Section: Hasil Dan Pembahasan Kandungan C-organik Tanahunclassified

Kontribusi Kompos Jerami-Biochar Dalam Peningkatan P-Tersedia, Jumlah Populasi BPF dan Hasil Padi Sawah

Noviani¹,

Slamet²,

Citraresmini³

2018

J. Ilmiah Aplikasi Isotop dan Radiasi

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ABSTRAKBahan organik telah terbukti berperan efektif dalam memulihkan kesuburan tanah. Indikator kesuburan tanah ini antara lain terletak pada kandungan C-organik tanah, jumlah populasi mikroba tanah, kandungan hara tersedia dan hasil tanaman. Penelitian ini dilakukan dengan tujuan mengetahui pengaruh dosis aplikasi kompos jerami-Biochar yang berinteraksi dengan pupuk kimia NPK, terhadap kandungan Corganik tanah, jumlah populasi Bakteri Pelarut Fosfat (BPF), ketersediaan P dan hasil tanaman padi sawah. Sasaran penelitian ini adalah mendapatkan interaksi perlakuan yang mampu memperbaiki kesuburan tanah, meningkatkan ketersediaan hara sehingga mendorong produksi tanaman lebih optimal, dan pemakaian pupuk NPK yang efisien. Percobaan dilakukan pada bulan April sampai dengan Agustus 2014 di kebun percobaan SPLPP Fakultas Pertanian UNPAD, berlokasi di Ciparay Kabupaten Bandung Jawa Barat. Perlakuan yang diterapkan adalah dosis kompos jerami-Biochar dalam 5 taraf dosis (0; 1; 2; 3; 4 t ha -1 ) dan dosis pupuk NPK dalam 4 taraf dosis yang semakin menurun dari dosis rekomendasi (100%, 80%; 60%; 40%), dengan menerapkan disain percobaan RAK pola faktorial. Hasil percobaan menunjukkan dosis kompos jerami-Biochar 2 t ha -1 mampu menyebabkan perbedaan respons yang signifikan dan tercapainya hasil tertinggi pada parameter respons kandungan C-organik tanah, jumlah populasi BPF, ketersediaan P, dan berat kering gabah. Interaksi 2 t ha -1 kompos jerami-Biochar dengan pupuk NPK mampu menurunkan pemakaian pupuk hingga 40%, pada hasil berat kering gabah tertinggi.Kata kunci : BPF, biochar, fosfat, kompos jerami, padi ABSTRACTOrganic matter has been shown to play an effective role in restoring soil fertility. These soil fertility indicators include, among others, the soil C-organic content, the population of soil microbes, the nutrient availability and plant yield. This study conducted with the purpose of assessing the impact of rice straw compost-Biochar and NPK chemical fertilizer application on soil C-organic content, phosphate solubilizer bacteria (PSB) population, P availability and crop production. The objective of this research is to get treatment interaction which is able to improve soil fertility, increase soil nutrient availability to encourage more optimal crop production, and provide the efficient use of NPK fertilizer. The experiment conducted from April to August 2014 in SPLPP experimental station of Agriculture Faculty UNPAD, located in Ciparay-Bandung regency West Java. Treatment applied is rice straw compost -Biochar in 5 level of doses (0; 1; 2; 3; 4 t ha -1 ) and NPK fertilizer in 4 levels of doses decreasing from recommendation dose (100%, 80%; 60 %; 40%), by applying the Complete Randomized Block design in the factorial pattern. The experimental results showed that 2 ts ha -1 of rice straw compost-Biochar was able to induce significant different responses and the highest soil C-organic content, number of PSB population, P availability, and dry weight of grain. Interaction of 2 ts ha -1 rice straw compost -Biochar...

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Chemistry of Lowland Rice Soils and Nutrient Availability

Cited by 149 publications

References 28 publications

Desempenho de cultivares de arroz com uso de reguladores de crescimento, em diferentes sistemas de cultivo

Desempenho de cultivares de arroz com uso de reguladores de crescimento, em diferentes sistemas de cultivo

Influence of Water Management and Silica Application on Rice Growth and Productivity in Central Java, Indonesia

Kontribusi Kompos Jerami-Biochar Dalam Peningkatan P-Tersedia, Jumlah Populasi BPF dan Hasil Padi Sawah

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