Raimundo Nonato de Lima

Influência da irrigação e do genótipo na produção de castanha em cajueiro-anão-precoce

(2) Resumo - Avaliou-se a influencia da irrigacao e do genotipo na producao de castanha em cajueiro-anao- precoce (Anacardium occidentale L.) durante tres anos. Foram estudados tres clones (CP 09, CP 76 e CP 1001) e quatro regimes hidricos (testemunha sem irrigacao e intervalos de irrigacao de um, tres e cinco dias). O delineamento experimental foi em blocos ao acaso, em parcelas subsubdivididas, com quatro repeticoes, com os regimes hidricos nas parcelas, os clones nas subparcelas, cada uma com quatro plantas, e os anos de producao nas subsubparcelas. A quantidade de agua aplicada nos tres tratamentos irrigados baseou-se na evaporacao do tanque classe A. Em relacao a producao de castanha, os clones de cajueiro-anao-precoce nao apresentaram comportamento diferencial em resposta a irriga- cao; os clones CP 09 e CP 76 mostraram-se superiores ao CP 1001 quanto a estabilidade de safra; independentemente do regime hidrico estudado, o clone CP 76 mostrou-se menos produtivo do que os clones CP 09 e CP 1001. Termos para indexacao: Anacardium occidentale, regime hidrico do solo, produtividade, fenologia. Influence of irrigation and genotype on the nut production of precocious dwarf cashew Abstract - The influence of irrigation and genotype on the nut yield of tree dwarf cashew (Anacardium occidentale L.) was evaluated in a three-year trial. Three clones (CP 09, CP 76 and CP 1001) and four irrigation treatments (control - without irrigation, irrigation at one, three and five days interval) were studied. The experimental design was in randomized blocks, with split-split plots and four replications, irrigation levels in plots, clones in split-plot, each one with four plants, and years of production in split- split plots. The amount of water applied in three irrigated treatments was based on information from a class A evaporation pan. Concerning cashew nut production, cashew dwarf clones did not show a differentiation as to irrigation treatments; clones CP 09 and CP 76 showed better performance than CP 1001 on stability of nut production; clone CP 76, independently of irrigation treatments used, showed less productivity than clones CP 09 and CP 1001.

Crescimento e desenvolvimento de clones de cajazeira cultivados na chapada do Apodi, Ceará

The experiment was established, at the Apodi Plateau; in Limoeiro do Norte County, State of Ceara (Brazil). A randomized block design was used with a factorial 5x2 (5 scions on 2 rootstocks), with 4 replicates and 4 plants per plot. Scions stem from superior plants collected in the counties of Caucaia (Capuan locality), Pacajus (Curimata locality), Maranguape (Gereau e Ladeira Grande localities) and Fortaleza (Lagoa Redonda locality). Rootstocks were prepared from seeds of S. mombin L. and S. tuberosa Arruda. All scions and rootstocks were collected in Ceara State. The parameters assessed were the vegetative growth and fruit setting. Clones Gereau and Lagoa Redonda were the most vigorous, higher (3.9 m) and with bigger stem girth (57 cm). Ladeira Grande showed the poorest peformance in hight (2.2 m) and stem girth (49 cm) and, being statistically different from the others. As far as the root-stocks are concerned those from S. mombim were superior to S. tuberosa. The stem girth ratio was less than 1.0 for S. mombin rootstocks and higher than 1.0 for S. tuberosa rootstocks. The number of fruits per bunch of studied clones presented values of raged from 8 to 76. Some plants of Lagoa Redonda and Gereau clones on S. tuberosa yielded from 100 to 300 bunches. Final results confirmed that scions of S. mombin grafted on rootstocks of S. mombin and S. tuberosa produced combinations with the following characterists: vigorous clones with distinct phenotypic and morphological features such as low hight, uniform canopies and standardized main stem growth; S. mombin rootstocks allowed the formation of plants with more vigorous stems compared with rootstocks of S. tuberosa; the stem girth, graft and rootstock ratios were higher for combinations on S. tuberosa, but without indications of grafting incompatibility; the rootstock of S. tuberosa increase plant hight, productive and precocious of clones Gereau e Lagoa Redonda, and clone Ladeira Grande showed the lowest hight.

Uso de efluentes da carcinicultura na irrigação de Panicum maximum cvs. Tanzânia e Mombaça

The study aimed to evaluate soil chemical changes and yield of two cultivars of Panicum maximum Jacq. (Tanzania and Mombaca) in response to irrigation with effluent from inland shrimp farming and compare the results with those obtained with conventional irrigation using river water. The experiment was carried out in a shrimp farm, in Russas-CE, Brazil. It was used a randomized block design, in a factorial 2 (grass cultivars) x 2 (types of irrigation water). The following yield variables were evaluated in four grass cuttings: height, dry matter yield and dry matter content. Data were analyzed by ANOVA and Tukey test. The following soil chemical properties were analyzed before and after treatment application: pH, electrical conductivity of saturated extract (CE), exchangeable sodium percentage (ESP), organic matter, P, K + , Ca 2+ , Mg 2+ and Na + . Data were analyzed using t tests for paired observations, at 5% significance level. Irrigation with effluent from shrimp farming did not increased or reduced significantly dry matter yield of two cultivars of Panicum maximum as compared to irrigation with Jaguaribe river water. After 14 months of cultivation, levels of Na + , CE and ESP increased significantly (p

Uso de efluentes da carcinicultura de águas interiores na irrigação do arroz

O trabalho objetivou avaliar a producao de arroz e as alteracoes quimicas do solo, em resposta a irrigacao com o efluente da carcinicultura de aguas interiores e comparar os resultados com aqueles obtidos com a irrigacao convencional, utilizando agua do Rio Jaguaribe. A producao de graos obtida com o uso do efluente da carcinicultura foi semelhante aquela obtida com o uso da agua de rio, quando foi utilizada na adubacao uma dose de N-P-K equivalente a 100% da dose recomendada para a cultura. O uso do efluente na irrigacao proporcionou maior producao de graos em relacao a irrigacao com a agua de rio, quando foi utilizada uma dose de N-P-K equivalente a 75% daquela recomendada para a cultura do arroz. Apos o cultivo, o solo irrigado com o efluente apresentou maiores niveis de Na+, CEes e PST em relacao ao solo irrigado com a agua do Rio Jaguaribe.