黄麻工艺纤维细度的研究

研究表明：圆果种比长果种工艺纤维支数高65公支左右；品种间差异极显著；工艺纤维细度与单株原麻重等5个经济性状呈极显著负相关，与出麻率等性状呈显著正相关；麻株各部位中以中部工艺纤维支数最高，梢部次之，基部最低；适时播种、适当密植、适量适时施肥，适时早收等栽培技术措施能提高工艺纤维支数。通过对构成产量和工     

Correlation Analysis on the Fineness and Single Fiber Strength of Alpaca Wool Fiber

In this study,321 samples were tested to evaluate the correlation between fineness and single fiber strength of alpaca fiber. The results showed that fineness average of lateral part was 24.30 μm,subject range was from 18.01 to 27.00 μm,accounted for 72% of the total samples;The strength average was 8.31 cN,subject range was from 5.01 to 11.00 cN, accounted for 88% of the total samples, it showed that the overall fineness of alpaca wool fiber was fine,the strength could satisfy the textile technology. The correlation results showed that the fineness of different parts (neck, shoulder, thigh, abdomen, lateral and back) in different groups (sex, age) all reflected that the wool fiber of the back was the finest,the strength was the minimal;And that of abdomen was the thickest,the strength was the maximum. On the other hand, we knew the greater the strength, the fineness was thicker; The smaller the strength, the fineness was finer from the distribution of different fineness range corresponded to the strength. In addition, there was also a positive correlation between them in differernt groups (sex,age),the fineness of adult alpaca was thicker than yearling alpaca, the male alpaca was thicker than female alpaca; The strength of adult alpaca was stronger than yearling alpaca, the male alpaca was stronger than female alpaca. The above results showed that the fineness of alpaca wool fiber was positively correlated with the single fiber strength.     

基于CA-Markov模型的自然保护区土地利用变化分析

以广西山口红树林自然保护区为研究区,1999和2005年SPOT4影像作为土地利用信息源,采用CA-Markov模型预测2011年和2017年研究区土地利用空间变化,在此基础上利用11个景观指数分析1999-2017年研究区整体景观格局演变情况。结果显示,CA-Markov模型模拟的2005年土地利用空间分布的面积和空间精度分别为93.13%和87.57%,具有较高可靠度;1999-2005年各用地类型的相互转化较为复杂;2005-2011年,红树林和养殖区增长最为显著;1999-2017年间,斑块数呈下降趋势,景观破碎化程度在减轻,受人类活动的影响在减弱,各斑块类型在景观中呈均衡化趋势分布,但景观稳定性和抗干扰性下降。研究表明CA-Markov模型是模拟与预测自然保护区土地利用变化的有力工具,能为土地规划与管理提供一定的决策信息。     

积的压缩映象的某些不动点定理

在完备度量空间上研究了可换积的压缩映象,从而建立了若干不动点定理,证明了不动点存在性、唯一性。它们是参考文献「１」－「４」的主要结果的改进、统一和发展。     

Field evaluation and break-even analysis of specialty soybeans for biodiesel and meal protein production

The economic value of a soybean [Glycine max (L.) Merr.] crop depends on yield and quality. The objectives of this study were to evaluate soybean lines for protein and oil content and to examine the break-even (BE) analysis of these traits combined with yield. Forty lines of maturity group (MG) IV or V were grown at four Arkansas locations for two years. Yield, protein, and oil content of each line were determined and compared to the check average for a BE comparison of the total economic value of the line. Results showed six profitable lines ($8.40 to $54.96 per metric ton based on yield) in 2008 and six profitable lines ($0.49 to $61.19 per metric ton based on yield) in 2009. Overall, in both MG, high-protein lines needed to yield more to be profitable, whereas high-oil lines had competitive yield, protein and oil content; R00-764 (MG IV), R05-71 (MG V), and R02-6185F (MG V) were competitive without added premiums.     

陆海杂种高代回交自交系纤维细度性状相关性分析

 利用陆地棉34B与海岛棉Giza70杂交所得的稳定的高代回交自交系BC₂F_4:6 、BC₂F_4:7家系,开展了三个环境下纤维细度等品质性状的相关分析。结果表明：1)纺纱均匀指数与长度、整齐度、比强度呈极显著正相关,与伸长率呈极显著负相关。纤维长度和比强度间均存在极显著的正相关,与伸长率呈极显著负相关。2) HVI 900测定的麦克隆值与比强度和纺纱均匀指数呈极显著负相关;成熟度比率与麦克隆值呈显著或极显著正相关,与线密度呈极显著负相关,与其它性状间的相关性三个环境下都不一致;线密度与纺纱均匀指数呈极显著正相关,与长度、比强度均达到极显著或显著负相关,与整齐度不相关,与伸长率为负相关。相对而言,线密度与各性状的相关性要比HVI 900测定的麦克隆值和成熟度比率稳定,受环境影响小,有必要进一步加强对线密度的选择及深入研究。     

阿拉善双峰驼的驼绒细度分析

通过对不同产地、不同性别、不同年龄阿拉善双峰驼驼绒细度的分析,为阿拉善双峰驼的进一步选育提供参考。结果表明,公驼驼绒细度显著高于母驼驼绒细度,银根苏木双峰驼驼绒细度极显著高于敖伦布拉格镇、吉兰泰镇和巴彦诺尔公苏木驼绒细度,而敖伦布拉格镇、吉兰泰镇和巴彦诺尔公苏木这3个产地的阿拉善双峰驼绒细度均在18μm以下,且无显著差异。3、4、5和6岁阿拉善双峰驼的驼绒细度显著高于2岁阿拉善双峰驼绒细度,且显著低于7、8、9和10岁阿拉善双峰驼的驼绒细度。     

羊驼毛纤维细度与单纤维强力相关性分析

本试验采用相关国家方法标准对321只羊驼毛绒样品开展了纤维细度及单纤维强力参数的检测,旨在分析羊驼毛纤维细度、单纤维强力及二者之间的相关性。结果表明,羊驼侧部毛纤维平均细度为24.30 μm,细度主体范围为18.01~27.00 μm,占样本总量的72%;平均纤维强力为8.31 cN,主体范围为5.01~11.00 cN,占样本总量的88%,说明羊驼毛整体细度较细,强力可满足纺织加工要求。羊驼毛细度和单纤维强力相关性分析发现,不同性别、年龄的羊驼颈部、肩部、股部、腹部、侧部、背部6个不同部位细度、单纤维强力都反映为背部最细,单纤维强力最小,腹部细度最粗,单纤维强力最大;另外,从羊驼毛不同细度区间对应单纤维强力分布也可看出,羊驼毛的单纤维强力值越大其细度值越大,反之越小;除此之外,不同性别、年龄的羊驼毛细度对应单纤维强力也呈正相关,成年羊驼毛细度粗于周岁羊驼,公羊驼毛细度粗于母羊驼,成年羊驼单纤维强力大于周岁羊驼,公羊驼单纤维强力大于母羊驼。综合以上结果,说明羊驼毛细度与单纤维强力呈正相关。