Determinación del porcentaje de mortalidad de Malezas, en la interacción radiación solar – plásticos de colores, en café trasplantado en Pablo Yacu

• Autor: Escobedo Chasnamote, Martha Adela
• Formato: tesis de grado
• Fecha de Publicación: 2015
• Institución: Universidad Nacional de San Martin - Tarapoto
• Repositorio: UNSM-Institucional
• Lenguaje: español
• OAI Identifier: oai:repositorio.unsm.edu.pe:11458/241
• Enlace del recurso: http://hdl.handle.net/11458/241
• Nivel de acceso: acceso abierto
• Materia: Determinación; porcentaje; mortalidad; Malezas; interacción; radiación; solar; plásticos; colores; café; trasplantado; Pablo; Yacu

The project was carried out in Moyobamba province and district, in Marona locality, in "Pabloyacu" research and Production Center, ecology Faculty- San Martin National University -Tarapoto, in the months of January to July 2014, for six months. The specific aims were, to identify and to tell the post emergent in the experimental field, during the first months of the transplanted coffee; to locate striping of plastic of colors on the soil, between the rows of the coffee plants, to determine the scrub mortality percentage in each treatment; evaluate the biomass, the density and height of the weed plant and establish a linear regression between them. The terms of reference of the raised problem were is how much the scrub percentage of mortality, in the interaction solar radiation - plastic of colors located after the transplant of coffee? The variables were: lnteraction solar radiation- plastics (lndependent Variable), as an indicator of plastics color red, black, green, clear, yellow, and the percentage of mortality of weeds (dependent variable), indicator such as the· number of dead plants/square meter, taking the alternative hypothesis to prove, yes, we make the interaction solar radiation - colored plastics on the ground, then the percentage of mortality of weeds in the field of coffee, introduced statistical difference. Among the treatments were evaluated, the witness (T1), red plastic (T2), black plastic (T3), green plastic (T4), plastic transparent (T5) and yellow plastic (T6). They were alllocated within 05 days after coffee transplantation. The conclusions were: in the identification of the weeds presented in the experimental field was eleven (11) genres, among them were: Brachiaria decumbens "Braquiaria", Eleusine indica ("Pata de gallina"), Cyperus rotundus ("Coquito"), Scyrpus comunis ("Varita de San José"), Talinum paniculatum "Verdolaga de hoja ancha", Plantago majar, "Llantén", Andropogum brasiliensis, "Cashucsha", Phyllantus neruri, "Chanca piedra", Cortadeira sp ("Cortadera"). And between broadleaf plants, Taraxacum officinalis,"Amargón", Chenopodium sp "Paico". In the evaluation of the % of mortality, no significance was found between the treatments, the weeds that were under the coverage of the various colors of plastics, protruding the transparent colors, green and black, with the 100% mortality and the red and yellow colors reached 99.74 %, with a CV of 6.11 % working with data processed. ~- In the evaluation of the green biomass and biomass dry of the weeds, not in the rainy season, when removing weeds in the area without coverage located in each experimental unit, there was no significance. Later, during the evaluations of dry weight of weeds (gr) in the month or rainy season, the density of weeds, plant height to 25 days of installation of the coffee plantation and plant height at the end of the investigation, not presented significance, all the values presented statistical similarity. In the follow-up evaluations, the % of weeds alive presented high statistical significance, in which the witness reached 100 %, while under plastic mulches of red, green and yellow reached 0% of live plants. While the coverage with transparent plastic and black presented the values of 1.25 and 1.75 %, with transformed data into (X+1) 112 . The ANVA for evaluations of To under the coverage of colored plastics, showed high significance, when processing the data obtained in day of sun and cloudy day, at the same time of the afternoon, 1 :00 PM To establish the linear regression between the biomes (Yi) and the No of plants/m2 (xi), the value "b" was negative (b = -1.94), i.e. when increase the density of weeds, the biomass per plant decreased. The correlation coefficient "r", was negative, with the value r = -0,414 . The linear regression between the biomass (Yi) and plant height (xi), the value "b" was positive (b =O, 145 ), which indicates that the increase plant height, increased biomass. The correlation coefficient was also positive, lt is to say r = 0,274. Key words: coffee plants; experimental field. JR.