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首页> 外文学位 >Microclimatological characteristics and soil pH adaptability of herbaceous mimosa (Mimosa strigillosa Torr. and Gray) at Nacogdoches, Texas, a new reclamation species in the southern United States.
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Microclimatological characteristics and soil pH adaptability of herbaceous mimosa (Mimosa strigillosa Torr. and Gray) at Nacogdoches, Texas, a new reclamation species in the southern United States.

机译：美国南部新的垦殖地德克萨斯州纳科多奇斯的含草含羞草（含羞草和灰色）的微气候特征和土壤pH适应性。

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摘要

Two studies were conducted on herbaceous mimosa (Mimosa strigillosa); a microclimate study and a pH adaptability study. In the microclimate study, soil microclimates between the mimosa and bare ground were observed during a 12 month period (June 1993-May 1994). The microclimatic variables measured in the study included solar radiation, reflected solar radiation, air temperature, soil temperature at 2 cm depth, surface soil temperature, soil heat flux. relative humidity, precipitation, pan evaporation, wind speed and evapotranspiration. A floating lysimeter was built to study the evapotranspiration of the herbaceous mimosa. At the mimosa plot, surface temperature is cooler, outgoing shortwave and longwave radiation are lower, net radiation is higher, and water loss is increased. Net radiation is higher in the summer, under clear skies. and at the mimosa plot. Total evapotranspiration (ET) for the mimosa plot during the study period (June to October 1993) was 241.5 mm while total evaporation for the bare ground during the same period was 162.6 mm. ET for herbaceous mimosa can be empirically estimated using incoming solar radiation, daily mean air temperature and daily mean relative humidity with R;In the pH study, herbaceous mimosa seeds were planted in 40 pots which consisted of 10 different soil-pH scale treatments with 4 replicates. The soil-pH ranged from 4.0 to 8.0 with an increment of roughly 0.5. After 15 days, seedling emergence was observed and recorded. The plants were grown for 22 weeks. Then, they were dismantled for analyses of biomass, certain growth and development characteristics, and plant and soil nutrient-contents. The seedling emergence of herbaceous mimosa occurred in 3-4 days after seeding no matter what the soil pH was from as low as 4.1 or as high as 8.0. However, the emergence rate was only about 50-70% for pH in the range 4.7 to 6.6. After emerging, the survival rate was greater than 93% except in soil with a pH of 4.1 which was less than 50%. The optimum growth of herbaceous mimosa was on soils with a pH range of 6.2 to 7.1. In this pH range, herbaceous mimosa exhibits higher total dry biomass weight and lower root shoot weight and length ratio. It is not suitable to grow herbaceous mimosa on soils with pH of 4.1 probably due to toxicities caused by Al
机译：对草含羞草（含羞草）进行了两项研究。小气候研究和pH适应性研究。在微气候研究中，在12个月内（1993年6月至1994年5月）观察到了含羞草和裸露地面之间的土壤微气候。该研究中测得的微气候变量包括太阳辐射，反射太阳辐射，空气温度，2 cm深度的土壤温度，表层土壤温度，土壤热通量。相对湿度，降水，蒸发皿蒸发，风速和蒸散量。建造了一个浮动测渗仪，以研究草本含羞草的蒸散量。在含羞草区，地表温度较低，短波和长波的辐射较低，净辐射较高，水分损失增加。在晴朗的天空下，夏季的净辐射较高。在含羞草的情节上在研究期间（1993年6月至1993年10月），含羞草区的总蒸散量（ET）为241.5 mm，而同一时期裸露地面的总蒸发量为162.6 mm。可以使用入射的太阳辐射，每日平均气温和每日平均相对湿度和R来凭经验估算草本含羞草的ET;在pH研究中，将草本含羞草种子种植在40个盆中，该盆由10种不同的土壤pH规模处理和4种组成复制。土壤的pH值范围从4.0到8.0，大约增加0.5。 15天后，观察并记录幼苗出苗。使植物生长22周。然后拆除它们，以分析生物量，某些生长和发育特征以及植物和土壤的养分含量。无论土壤的pH值从低到4.1还是高到8.0，播种后的3-4天都出现了草状含羞草的出苗。然而，对于pH在4.7至6.6范围内的出现率仅约50-70％。出现后，存活率大于93％，但在pH小于4.1的土壤中除外。草本含羞草的最佳生长是在pH值为6.2至7.1的土壤上。在此pH范围内，草含羞草表现出较高的总干生物量重量和较低的根茎重量和长度比。 pH值为4.1的土壤可能不适合在草本含羞草上生长，这可能是由于Al引起的毒性

著录项

  • 作者

    Nuruddin, Ahmad Ainuddin.;

  • 作者单位

    Stephen F. Austin State University.;

  • 授予单位 Stephen F. Austin State University.;
  • 学科 Agriculture Forestry and Wildlife.;Environmental Sciences.
  • 学位 D.F.
  • 年度 1996
  • 页码 197 p.
  • 总页数 197
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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