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首页> 外文学位 >In-row plant spacing and row configuration effects on 'Beauregard' (Ipomoea batatas (L.) Lam.) sweetpotato yield grades.
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In-row plant spacing and row configuration effects on 'Beauregard' (Ipomoea batatas (L.) Lam.) sweetpotato yield grades.

机译：行距和行结构对'Beauregard'（番薯（L.）Lam。）甘薯产量等级的影响。

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摘要

As acreage of sweetpotatoes continues to rise, land suitable land for production is becoming a rarity in the traditional sweetpotato growing region of Mississippi. As production moves to less desirable soils, production and quality diminishes. A two-year study was designed to evaluate increasing plant populations/ha-1 as a means of reducing land requirements for current production levels. Populations were increased using narrow-row beds and multiple-drill wide beds. The experimental design used was a 3 x 4 factorial arrangement of treatments in a randomized complete block design containing four replications. Main treatments were: row spacing (RS)---76, 102, 152 and 203-cm; plant spacing (PS)---23, 30 and 38-cm. Soil type was a Faulkner silt loam (Fine-silty, siliceous, thermic Aquic Paleudalfs). Year*RS and Year*PS interactions were found. These were probably due to below-average rainfall events in 2000 limiting root enlargement. In 2000, the industry standard RS of 102-cm produced more yield than all other treatments in U.S. No. 1, canner, and total marketable root grades. There was a trend for the highest plant density treatment, 152-cm RS, to return the lowest yield in each grade with the exception of jumbo roots. In 2001, the 102-cm RS produced the greatest yield of U.S. No. 1, canner, and total marketable roots. The narrow-row, 76-cm bed produced greater (P ≤ 0.05) yields than did multiple-drill beds in U.S. No. 1, canner and total marketable roots. No significant differences among treatments were seen with the cull grade. Plant spacing (PS) did not cause significant effects for any grade in 2000. U.S. No. 1, total marketable and cull grades were non-significant in 2001. There was a trend for U.S. No. 1 yield to increase as PS increased. The 23-cm PS provided the greatest yield of canner roots while the 30 and 38-cm treatments were not separated. Simple regression analysis revealed weak negative correlations between population and U.S. No. 1 yield (R2 = 0.62) and total marketable root yield (R2 = 0.61). A cost analysis was constructed to determine economical returns. 1/t appears input costs for plants and labor render higher population treatments unprofitable. Thus, the standard combination of 102-cm RS along with a 30 to 38-cm PS is recommended.
机译：随着甘薯种植面积的不断增加，在密西西比州传统的甘薯种植地区，适合生产的土地变得稀缺。随着生产转向不太理想的土壤，生产和质量下降。一项为期两年的研究旨在评估不断增加的植物种群/ ha-1，以此来减少当前生产水平下的土地需求。使用窄排床和多钻宽床增加了人口。所使用的实验设计是在包含四个重复的随机完整块设计中按3 x 4阶乘安排处理。主要处理方法为：行距（RS）--- 76、102、152和203-cm；植物间距（PS）--- 23、30和38厘米。土壤类型为福克纳粉质壤土（细粉质，硅质，热性Aquic Paleudalfs）。发现Year * RS和Year * PS交互。这可能是由于2000年降雨低于平均水平，限制了根系扩大。 2000年，工业标准RS 102厘米产生的产量比美国1号罐头和其他可销售根系产品的所有其他处理方法都要多。种植最高密度（152 cm RS）的趋势是，除巨型根外，每个等级的产量最低。在2001年，直径102厘米的RS产生了美国产量最高的1号罐头和可销售的总根。与美国1号罐头和可销售根系相比，窄行76厘米的床单产比多钻床更高（P≤0.05）。剔除等级未见治疗之间的显着差异。株距（PS）不会对2000年的任何等级造成明显影响。美国1号商品的可销售等级和剔除等级在2001年均不重要。美国1号产量有随PS增加而增加的趋势。 23厘米PS可以提供​​最大的罐头根部产量，而30厘米和38厘米处理没有分开。简单回归分析显示，人口与美国1号产量（R2 = 0.62）和可销售根总产量（R2 = 0.61）之间呈弱负相关。进行了成本分析以确定经济收益。 1 / t的工厂和劳动力的投入成本使较高的人口待遇无利可图。因此，建议将102厘米RS与30到38厘米PS的标准组合。

著录项

  • 作者

    Burdine, William Boyd, Jr.;

  • 作者单位

    Mississippi State University.;

  • 授予单位 Mississippi State University.;
  • 学科 Agronomy.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 68 p.
  • 总页数 68
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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