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首页> 外文学位 >THE POTENTIAL OF RAINFED SORGHUM AND MILLET IN SOUTHWESTERN DOMINICAN REPUBLIC (AGROCLIMATOLOGY, AGRICULTURAL CLIMATOLOGY, FARMING SYSTEMS).
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THE POTENTIAL OF RAINFED SORGHUM AND MILLET IN SOUTHWESTERN DOMINICAN REPUBLIC (AGROCLIMATOLOGY, AGRICULTURAL CLIMATOLOGY, FARMING SYSTEMS).

机译：多米尼加西南部（农业气候学，农业气候学，农业系统）发芽的高粱和小米的潜力。

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摘要

The farming systems and agricultural potential of the southwest were studied and summarized. An agroclimatic calendar was developed for this important zone. The cropping systems were grouped into 5 general categories based on topography, access to water and farm size. Corn is grown by most farmers as animal feed. Basic dietary habits will not be affected by replacing corn with sorghum or millet. Small farmers in risky, rainfed areas are the most likely to benefit from sorghum production.;The climates and growing seasons of the southwest region were classified and compared. There is a moisture gradient from the arid coastal lowlands to the higher elevations near the Haitian border. Crop specific agroclimatic normals were generated to compare the adaptation of corn and sorghum in the southwest. Growing conditions are poor for both crops in the semi-arid areas of the southwest. Drought resistance would be a desirable characteristic for any dryland crop.;Precipitation patterns and their effect on agriculture were analyzed and discussed. Rainfall is the major limiting factor to crop production in the Southwest. Rainfall is highly variable and undependable. Monthly rainfall probabilities for San Juan and Elias Pina, which have different rainfall patterns, were calculated and compared. The severity of the mid-summer drought, or veranillo, was studied using probability analysis. Due to the very risky climatic situation, drought resistant sorghum and millet would have potential under rainfed conditions in the semi-arid areas of the southwest.;Also discussed are the cultural aspects of graduate student training overseas. Overseas opportunities for graduate students should be continued and expanded.;A phenological study was conducted at four elevations in southwestern Dominican Republic. Linear regression analysis between growing degree days (GDD) and stage of development were developed for corn (Zea mays), sorghum (Sorghum bicolor (L.) Moench), pearl millet (Pennisetum typhoides) and proso millet (Panicum miliaceum). It was found that GDD accumulations estimate crop maturity better than time alone. Phenology-GDD relationships permit comparisons between crops, locations and planting times.
机译：研究和总结了西南地区的耕作制度和农业潜力。为此重要地区制定了农业气候日历。根据地形，获得水源和农场规模的不同，种植系统分为5个大类。大多数农民将玉米作为动物饲料种植。用高粱或小米代替玉米不会影响基本的饮食习惯。在高风险，多雨地区的小农最有可能从高粱生产中受益。西南地区的气候和生长季节被分类和比较。从干旱的沿海低地到海地边界附近的高海拔地区都有一个湿度梯度。产生了特定农作气候的正常值，以比较西南部玉米和高粱的适应性。西南半干旱地区两种作物的生长条件都很差。抗旱性将是任何旱地作物的理想特性。;分析和讨论了降水模式及其对农业的影响。降雨是西南地区作物生产的主要限制因素。降雨变化多端且不可靠。计算并比较了具有不同降雨模式的圣胡安和埃里亚斯皮纳的每月降雨概率。使用概率分析研究了仲夏干旱或维拉尼约的严重程度。由于气候风险非常高，西南半干旱地区在雨水条件下，抗旱的高粱和小米具有潜力。此外，还讨论了海外研究生培养的文化方面。应继续并扩大研究生的海外机会。;在多米尼加共和国西南部的四个海拔地区进行了物候研究。针对玉米（Zea mays），高粱（Sorghum bicolor（L.）Moench），珍珠粟（Pennisetum typhoides）和小谷（Panicum miliaceum）的生长日（GDD）和发育阶段之间进行了线性回归分析。已经发现，GDD积累比单独的时间更好地估计作物成熟。物候与GDD的关系允许在作物，位置和播种时间之间进行比较。

著录项

  • 作者

    LOGAN, JOANNE.;

  • 作者单位

    The University of Nebraska - Lincoln.;

  • 授予单位 The University of Nebraska - Lincoln.;
  • 学科 Agriculture Agronomy.
  • 学位 Ph.D.
  • 年度 1984
  • 页码 175 p.
  • 总页数 175
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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