Clonal propagation of guava in different means of rooting

Abstract

There are records of the cultivation of guava in Calvillo since 1824; currently, 2,500 producers are engaged in cultivation and 95,000 tons are harvested annually, which generates a significant economic spill. With the objective of evaluating the impact of six substrates alone (100%) and mixed with sand in equal proportions (50% and 50%), in the rooting of stakes, in the Center of Agricultural Sciences of the UAA, it was carried out during 2017-18, the investigation. The stakes were obtained from elite trees of the Germplasm Bank of the UAA, plastic pots 29 cm high and 30 cm wide were used, which were filled leaving 3 cm edge for irrigation, the stakes were impregnated in the base with the radix 10,000 ppm root and were covered with plastic bag to create a wet chamber. They were placed inside a greenhouse, a half shade mesh was placed on the roof to reduce the light, and they were watered 3 times a week. The relative temperature and humidity were recorded at 8:00 am, 12:00 pm and 4:00 pm, during the months of June to October; the monthly average was calculated for each hour. At five months, the variables were evaluated: total number of roots (NTR), number of roots per stake (NRE), percentage of rooted stakes (% EE) and length of the largest root (LR + G cm). The treatments with the highest NTR, NRE, % EE and LR + G, were Coconut Fiber (100%) (24.4 roots, 4,889 roots per stake, 98% and 10.1 cm), mesquite sawdust + sand (50% + 50 %), (24.1 roots, 4.83 roots per stake, 97%, 2.8 cm) and cereal straw (100%) (22.8 roots, 4.56 roots per stake, 91%, 7.2 cm).