Browsing by Subject "Rainfall"

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Determinants of grassland primary production in seasonally-dry silvopastoral systems in Central America

Rusch, G. M.; Zapata, P. C.; Casanoves, F.; Casals, P.; Ibrahim, M.; DeClerck, F. (2014-06)

Grassland primary productivity is the function that underpins the majority of the fodder production in cattle-rearing silvopastoral farms. Hence, understanding the factors that determine grassland productivity is critical ...
Irrigation response of potato (Solanum tuberosum L.) var. R12 Diacol Capiro

Peña Baracaldo, Fernando Javier; Zenner de Polanía, Ingeborg (Bogotá : Universidad de Ciencias Aplicadas y Ambientales, 2015, 2015-07)

Irrigation is one of the agronomic practices seldom employed by potato growers, either because of water unavailability or lack of knowledge of the benefits of the appropriate water ...

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Determinants of grassland primary production in seasonally-dry silvopastoral systems in Central America
...
Rusch, G. M. | 2014-06

Grassland primary productivity is the function that underpins the majority of the fodder production in cattle-rearing silvopastoral farms. Hence, understanding the factors that determine grassland productivity is critical for the design and management of silvpastoral systems. We studied the effect of two factors with documented impact on grassland productivity in seasonally dry silvopastures of Nicaragua, rainfall and trees. We assessed the effects of three species that differed in crown size and phenology, one evergreen, Cassia grandis, and two deciduous species, Guazuma ulmifolia and Tabebuia rosea. Overall, grassland ANPP had a quadratic response to rainfall, with a decline at high rainfall that coincided with peak standing biomass and grassland cover. Trees had a predominately negative effect on grassland productivity, and the effect was concentrated in the rainy season at peak productivity. The effect of the trees corresponded with the tree crown area, but not with crown density. Trees reduced the standing biomass of graminoids and increased forb biomass; thus, the effect of trees on grassland ANPP appears in part to respond to changes in grassland composition. We also found higher levels of soil moisture content below the tree canopy, particularly at the peak of the rainy season when soils tend to become waterlogged. The evergreen species, C. grandis, affected grassland ANPP more strongly than the deciduous species.

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Irrigation response of potato (Solanum tuberosum L.) var. R12 Diacol Capiro
...
Peña Baracaldo, Fernando Javier | 2015-07

Irrigation is one of the agronomic practices seldom employed by potato growers, either because of water unavailability or lack of knowledge of the benefits of the appropriate water use. In order to demonstrate this benefit, in a cycle of five months, regarding of a commercial crop located in Tenjo (Cundinamarca), we evaluate the response of the potato variety Diacol Capiro R-12 to three treatments, fertigation (T1), drip irrigation (T2), and the comparison with a conventional check without irrigation (T3), distributed under a completely randomized design. The influence of the treatments on the fresh and dry weight of leaves, stems and tubers was estimated. Throughout the assessment, the irrigation and fertigation treatments were superior to conventional one, showing statistically significant differences at harvest time, where treatment T1 showed an increase in yield of 72% and treatment T2 of 18%, compared with the control. Based on the results, fertigation can be considered as an option for farmers to increase their potato profitability and market competitiveness, since the impact generated by price fluctuations of the product can be reduced, obtaining higher and more constant yield per area unit, regardless of weather conditions during the crop cycle.

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Browsing by Subject "Rainfall"

Determinants of grassland primary production in seasonally-dry silvopastoral systems in Central America ﻿

Irrigation response of potato (Solanum tuberosum L.) var. R12 Diacol Capiro ﻿

Envíos recientes

Determinants of grassland primary production in seasonally-dry silvopastoral systems in Central America

Irrigation response of potato (Solanum tuberosum L.) var. R12 Diacol Capiro

Determinants of grassland primary production in seasonally-dry silvopastoral systems in Central America

Irrigation response of potato (Solanum tuberosum L.) var. R12 Diacol Capiro