Factores que inciden en la eficiencia de los sistemas ecológicos sostenidos
The effects that exercise the diverse factors on the sustained ecological systems or managed by the man (crops) are varied and complex. They act in a combined way, like it is the presence of plagues/diseases that couple their development cycles to those of the crops and the same time attack severely...
Kaydedildi:
| Baskı/Yayın Bilgisi: |
1998
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| Konular: | |
| Online Erişim: | http://hdl.handle.net/10872/5334 |
| Etiketler: |
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| Özet: | The effects that exercise the diverse factors on the sustained ecological systems or managed by the man (crops) are varied and complex. They act in a combined way, like it is the presence of plagues/diseases that couple their development cycles to those of the crops and the same time attack severely on the plantations if the environmental conditions are optimal. The objective of the presentation is to describe the action of the diverse factors that it impact negatively in crops making particular emphasis under the combined relationship of plagues and conditions of the environment (climate). To complete this objective, it lines as methodological strategy was summary of diverse studies and investigations that sustain partial relationships at least between the sustained systems and presence of plague-diseases, attack level in function to the conditions of the environment (climate). As a result the main factors are presented that affect to the crops in their yields: soils, meteorological elements and the negative interaction with other species (diseases and plagues); once described emphasis is made in two examples: the attack of lobsters (Schistocerca gregarious) in semi-arid areas of the Africa; and in second place, to the crops of the corn (Zea mays) and the action of diverse diseases and plagues and in particular the white fly (Ostrinia nubilalis Hbn). It concludes, that the diverse factors that affect the crops require of an integral handling given to the complexity of existent relationships among the diverse actors that compose these systems. |
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