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Role of green manure in low-input farming in the humid tropics

By: Material type: ArticleArticleLanguage: English Description: p. 185-191Subject(s): LOC classification:
  • 36895
In: In: Symposium on Sustainable Agriculture: The Role of Green Manure Crops in Rice Farming Systems (1987, Los Baños, Philippines). Green manure in rice farming: ProceedingsSummary: Se estudiaron el requerimiento de N y la utilizacion de sistemas de cultivo de secano (maiz, maiz/yuca, maiz/caupi, maiz/Stylosanthes, maiz/Mucuna, maiz/yuca/guandul), con manejo de bajo insumo durante varios anos, en condiciones de tropico humedo, en la region suroriental de Nigeria. Se obtuvo una produccion sostenida de cultivos alimenticios a tasas bajas de aplicacion de fertilizantes. El primer ano, la yuca no respondio a la aplicacion de N, pero en el segundo ano se observo una respuesta moderada. La yuca almacena una cantidad considerable de N en sus partes aereas, especialmente en los tallos; sin embargo, gran parte del N almacenado se elimina despues de la cosecha ya que la mayoria de los tallos se cortan para proporcionar estacas para la siguiente estacion o para evitar el rebrote en el campo. Por otra parte, cantidades sustanciales de N regresan al suelo mediante el desprendimiento de las hojas durante el crecimiento de la yuca. Despues del cultivo continuo durante 4 anos, la inclusion de una leguminosa en la rotacion de cultivos mostro un efecto residual importante en la oferta de N al maiz. La inclusion de abono verde en los sistemas de cultivo tradicionales parece ser la mejor alternativa para lograr una produccion agricola sostenida en un sistema agricola de bajo insumo. (CIAT)Summary: The N requirement and utilization of upland cropping systems (maize, maize/cassava, maize/cowpea, maize/Stylosanthes, maize/Mucuna, maize/cassava/pigeon pea), with low-input management, were studied for several yr under humid tropical conditions in SE Nigeria. Sustained food crop production was obtained at low rates of fertilizer application. The lst yr cassava showed no response to N, but the 2nd yr a moderate response was observed. Cassava was found to store considerable N in its aboveground parts, particularly the stems; a major part of the stored N, however, is removed after harvest as most stems are removed to provide cuttings for the next season or to prevent regrowth in the field. On the other hand, substantial quantities of N are returned to the soil through leaf fall during cassava growth. After continuous cropping for 4 yr, the inclusion of a legume in the crop rotation showed an important residual effect on N supply to maize. The inclusion of green manures to traditional cropping systems appears to be the best alternative to attain sustained crop production in low-input agriculture. (CIAT)
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Book Chapters Book Chapters CIAT Library Document collection CINFOS Document Collection CINFOS 36895 (Browse shelf(Opens below)) c.1 Short Loan 100056099
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Se estudiaron el requerimiento de N y la utilizacion de sistemas de cultivo de secano (maiz, maiz/yuca, maiz/caupi, maiz/Stylosanthes, maiz/Mucuna, maiz/yuca/guandul), con manejo de bajo insumo durante varios anos, en condiciones de tropico humedo, en la region suroriental de Nigeria. Se obtuvo una produccion sostenida de cultivos alimenticios a tasas bajas de aplicacion de fertilizantes. El primer ano, la yuca no respondio a la aplicacion de N, pero en el segundo ano se observo una respuesta moderada. La yuca almacena una cantidad considerable de N en sus partes aereas, especialmente en los tallos; sin embargo, gran parte del N almacenado se elimina despues de la cosecha ya que la mayoria de los tallos se cortan para proporcionar estacas para la siguiente estacion o para evitar el rebrote en el campo. Por otra parte, cantidades sustanciales de N regresan al suelo mediante el desprendimiento de las hojas durante el crecimiento de la yuca. Despues del cultivo continuo durante 4 anos, la inclusion de una leguminosa en la rotacion de cultivos mostro un efecto residual importante en la oferta de N al maiz. La inclusion de abono verde en los sistemas de cultivo tradicionales parece ser la mejor alternativa para lograr una produccion agricola sostenida en un sistema agricola de bajo insumo. (CIAT) spa

The N requirement and utilization of upland cropping systems (maize, maize/cassava, maize/cowpea, maize/Stylosanthes, maize/Mucuna, maize/cassava/pigeon pea), with low-input management, were studied for several yr under humid tropical conditions in SE Nigeria. Sustained food crop production was obtained at low rates of fertilizer application. The lst yr cassava showed no response to N, but the 2nd yr a moderate response was observed. Cassava was found to store considerable N in its aboveground parts, particularly the stems; a major part of the stored N, however, is removed after harvest as most stems are removed to provide cuttings for the next season or to prevent regrowth in the field. On the other hand, substantial quantities of N are returned to the soil through leaf fall during cassava growth. After continuous cropping for 4 yr, the inclusion of a legume in the crop rotation showed an important residual effect on N supply to maize. The inclusion of green manures to traditional cropping systems appears to be the best alternative to attain sustained crop production in low-input agriculture. (CIAT) eng

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