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Assessing the potential for vegetati...

Burpee, Charlotte Gaye.

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Assessing the potential for vegetative cover in harsh, tropical environments: A case study from the Dominican Republic.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Assessing the potential for vegetative cover in harsh, tropical environments: A case study from the Dominican Republic./
作者:	Burpee, Charlotte Gaye.
面頁冊數:	186 p.
附註:	Source: Dissertation Abstracts International, Volume: 56-10, Section: B, page: 5232.
Contained By:	Dissertation Abstracts International56-10B.
標題:	Agriculture, Agronomy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9605837

Assessing the potential for vegetative cover in harsh, tropical environments: A case study from the Dominican Republic.
Burpee, Charlotte Gaye.

Assessing the potential for vegetative cover in harsh, tropical environments: A case study from the Dominican Republic. - 186 p.

Source: Dissertation Abstracts International, Volume: 56-10, Section: B, page: 5232.

Thesis (Ph.D.)--Michigan State University, 1995.

Vegetative cover is a key to protecting soil from degradation, but is not used extensively in tropical agricultural systems, due in part to socio-economic and technical constraints. This research addressed physiological (weather and soil), ecological and socio-economic constraints to the use of vegetative cover for food production and erosion control in a rural village in the tropics. Specifically, there were four phases: (1) characterizing boundary conditions of temperature and water for germination of eight tropical species and two temperate benchmark species in growth chambers, (2) evaluating reliability of laboratory germination tests as a rapid screening technique for soil surface germination at a semi-arid field site, (3) investigating socio-economic factors with potential to affect dry-season cover crop adoption and use and (4) reviewing patterns of land use and marine ecosystem change and their relationship to human activity systems to address possible constraints and advantages to the use of vegetative cover.Subjects--Topical Terms:

1018679
Agriculture, Agronomy.

Assessing the potential for vegetative cover in harsh, tropical environments: A case study from the Dominican Republic.
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245 1 0 $a Assessing the potential for vegetative cover in harsh, tropical environments: A case study from the Dominican Republic.
300 $a 186 p.
500 $a Source: Dissertation Abstracts International, Volume: 56-10, Section: B, page: 5232.
500 $a Adviser: Francis J. Pierce.
502 $a Thesis (Ph.D.)--Michigan State University, 1995.
520 $a Vegetative cover is a key to protecting soil from degradation, but is not used extensively in tropical agricultural systems, due in part to socio-economic and technical constraints. This research addressed physiological (weather and soil), ecological and socio-economic constraints to the use of vegetative cover for food production and erosion control in a rural village in the tropics. Specifically, there were four phases: (1) characterizing boundary conditions of temperature and water for germination of eight tropical species and two temperate benchmark species in growth chambers, (2) evaluating reliability of laboratory germination tests as a rapid screening technique for soil surface germination at a semi-arid field site, (3) investigating socio-economic factors with potential to affect dry-season cover crop adoption and use and (4) reviewing patterns of land use and marine ecosystem change and their relationship to human activity systems to address possible constraints and advantages to the use of vegetative cover.
520 $a Boundary condition experiments clearly identified species with potential for harsh surface soil environments like those found in the village of Buen Hombre (vegetable amaranth, jack bean, tropical kudzu, lablab bean, sunnhemp, tepary bean, and tropical velvet bean). Two species, vegetable amaranth and tepary bean, germinated well under a wide range of temperatures and water potentials, and sunnhemp performed well at all but the driest water potentials. Jack bean, lablab bean and tropical velvet bean were only able to germinate within a narrow window of near-saturation water potentials, but tolerated a wide range of temperatures.
520 $a Field germination was reduced 19 to 44% compared to lab germination and was severely limited by biological interference from birds and insects. Biotic factors were equally or more important to germination success and early survival than soil or weather factors.
520 $a In combination with key informant and group interviews, traditional socio-economic survey instruments yielded valuable data. Villagers barely subsist in a non-cash farming-fishing economy, which is based on intricately related, fragile marine and terrestrial ecosystems. Vegetative cover, if introduced at no cost to farmers and evaluated in collaboration with them, has great potential to diversify agricultural production activities, extend the growing season and protect marine ecosystems from potentially damaging erosion.
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791 $a Ph.D.
792 $a 1995
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