Explore the vast range of titles available.

[Objective] Hyperspectral characteristics and effect of aspect on spectral reflectance of Pinus kesiya var. langbianensis canopy based on airborne remote sensing imagery were investigated in Caiyanghe National Park, southeast Pu'er, Yunnan province. [Method] Hyperspectral and Lidar data were obtained using airborne LiCHy system in April, 2014. The Lidar data were used to get DEM and slope data. In addition, the characteristic values of spectral curves of P.kesiya var. langbianensis stands in different aspects were statistically analyzed using hyperspectral and forest resources inventory data. [Result] (1) The spectral reflectance of P.kesiya var. langbianensis canopy was similar to that of green plant. The canopy reflectivity was high in the near infrared band (0.741.0 μm), of which, the highest reflectivity located in 0.89μm. (2) The spectral reflectance of P.kesiya var. langbianensis canopy in shady slope was higher than that in sunny slope. There was a significant difference at the peak reflectance of band

S758.5; [目的]以云南普洱菜阳河为例,基于机载遥感影像,探讨思茅松林冠层高光谱特征及坡向对其光谱反射率的影响.[方法]以2014年4月机载LiCHy系统获取的高光谱和激光雷达DEM提取的坡向数据,结合该地区二类调查数据,对不同坡向的思茅松林冠层光谱曲线特征值进行统计比较.[结果](1)思茅松冠层光谱反射特征与绿色植物光谱曲线总体相似,在0.74～1.0 μm近红外波段冠层反射率较高,0.89 μm最高;(2)阴坡思茅松冠层光谱反射率普遍高于阳坡,北坡、东北坡与南坡、东南坡的峰值波段反射率在0.05水平上差异显著;(3)根据太阳高度角,迎光面的东坡、东北坡、东南坡比背光面西坡、西北坡、西南坡光谱反射率在0.89 μm波段增加了14％～23％.[结论](1)思茅松冠层光谱反射率表现出“两谷一峰”、“红边”等典型的植被光谱特征,反射率较高的0.74～1.0 μm波段为思茅松的特征光谱段;(2)太阳高度角是影响不同坡向光谱反射率的主要因素,而坡向也是造成反射率差异的另一个重要原因.

[目的]通过机载遥感影像对普洱山区进行植被分类研究,为山区森林经营规划与可持续经营方案的制图提供高效应用途径。[方法]将2014年4月航拍的机载AISA Eagle II高光谱和Li DAR同步数据融合,利用点云数据提取的数字冠层高度模型（CHM）得到树种的垂直结构信息,结合经过主成分分析（PCA）的高光谱降维影像,选用支持向量机（SVM）分类器进行分类。[结果]普洱市万掌山实验区主要树种分为思茅松、西南桦、刺栲、木荷等。融合影像数据分类的总体精度和Kappa系数分别为80.54%、0.78,比单一高光谱影像数据分类精度分别提高6.55%、0.08,其中主要经营树种思茅松的制图精度达到了90.24%。[结论]该方法对山区主要树种的识别是有效的,将机载Li DAR与高光谱影像融合可以有效改善分类精度。

To explore the development regularity from shoot to stem, the culms in different developmental stages and portions of Moso bamboo (Phyllostachys heterocycla cv. pubescens) were studied by anatomy analysis. The resu!ts of histological observations indicated that the rapid development of culms mainly presented in longitudinal direction, which was dominated by cell division and cell elongation. In the initial stage of growth, numerous cell nuclei could be seen in parenchyma and fiber cells-an obvious sign of cell division-indicating the presence of meristematic tissue when cell division dominated the culms development. As the culm developed, the number of nuclei declined, until there were almost no detectable nuclei in the late stages of development. The development of culm was dominated by cell division in the initial stages and by cell elongation in the middle and late stages. The development, maturation and aging in different parts of the culm were studied systematically from the basal to the top internode. T

为研究超干燥保存手段运用于坡柳种子的可行性，采用正交设计从种子含水量、包装方法、保存温度和预回湿方法4个因素来分析。用硅胶将种子脱水至1．12％～6．13％6个含水量梯度，结合不同处理密封保存1年，随后测定发芽率和一些生理生化指标，包括相对电导率（RC）、脯氨酸（Pro）、丙二醛（MDA）、超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）、可溶性总糖含量和脂肪酸组分。结果表明：种子含水量是对发芽率影响最显著的因素，较为适宜的脱水范围为4．28％～5．25％；超干种子发芽率与相对电导率和丙二醛含量呈显著负相关，与脯氨酸含量和3种抗氧化酶活性呈显著正相关；超干种子的油酸和d．亚麻酸含量比对照提高。坡柳种子保存过程中的劣变是由细胞膜损伤和脂质过氧化所引起，而适宜的脱水处理能使抗氧化酶活性增强，使不饱和脂肪酸的含量增加，从而维持种子生活力的稳定。

[Objective] To classify the tree species in Puer's mountainous area by remote sensing image, and to search an efficient way to forest management planning.[Method] The AISA Eagle II hyperspectral data and airborne LiDAR taken in April of 2014 were merged, and based on Canopy Height Model (CHM) derived from airborne LiDAR point cloud data, the vertical structure data of target species were obtained. Then, the Principal Component Analysis (PCA) transformation was used to reduce the noise and dimension of hyperspectral image. Finally, the Support Vector Machine (SVM) approach was used to classify the main tree species of Pu'er city.[Result] (1) The main tree species of Puer are Pinus kesiya Royle ex Gord. var. langbianensis (A.Chev.) Gaussen, Betula alnoides Buch.-Ham. ex D. Don, Castanopsis hystrix A.DC, Schima superba Gardn. et Champ and so on. (2) It showed that the total accuracy and kappa coefficient are 80.54%, and 0.78, which are 6.55% and 0.08 higher compared with the classification accuracies without CHM

为探索毛竹从发笋到竹秆形成的组织发育规律,对不同发育时期和部位的毛竹茎秆进行组织解剖分析并进行数量化分析。结果表明：竹秆的快速发育主要表现在节间的纵轴方向,节间发育由细胞分裂和细胞伸长控制。发育初期,在薄壁细胞和纤维细胞上可以看到大量的细胞核出现,此时细胞分裂占主导地位;随着组织发育,细胞核逐渐减少并消失,薄壁细胞和纤维细胞的长度显著增加,细胞伸长在发育中后期占主导地位。竹秆的发育、成熟和老化从基部首先启动,中部和顶部要顺次晚一些。基部的纤维组织最先出现木质化,此时茎秆的高度大约为6 m。竹秆的细胞伸长呈阶段性的波动,薄壁组织的细胞长度在快速伸长期偏离正态分布,在缓慢伸长期呈正态分布。

濒危植物翠柏为柏科高大珍贵用材树种,通过对翠柏主要分布区墨江、昌宁翠柏植株树干解析,研究了两地翠柏的生长特性,结果表明：（1）翠柏在20年前生长缓慢,20—60年进入快速生长期,70年以后达到数量成熟,材积生长量开始下降并趋于稳定;（2）翠柏幼苗期具有耐荫性和长大后有喜光特性,墨江地区翠柏生长好于昌宁地区,其生长表现与两地自然条件相符合;（3）针对翠柏特点,提出幼苗时搭建荫棚,幼树时期进行疏伐,数量成熟时期进行间伐或疏伐等促进生长经营措施,为翠柏资源培育与保护奠定基础。

Non-timber forest products (NTFPs) supply necessary living material and development conditions for human being. In this paper, the features and concepts of NTFPs are summarized based on the related studies on NTFPs. Meanwhile, a four-leveled NTFPs classification system is suggested according to China’s current situations. At the first level, NTFPs are divided into three types, i.e. produced from animal, plant and microbe; At the second level, NTFPs are subdivided into sixteen types, i.e. food, medical material, industrial material, etc.; At the third levels, NTFPs are comprised with 54 types including beasts, birds, eatable material, vegetables, forage, etc.; At the fourth level, NTFPs are consisted of 142 items. The NTFPs classification system could provided useful references for the further studies on re-classification, exploitation and utilization, resources monitoring and monitor index system of China’s NTFPs. 在参考国内外研究成果的基础上,总结出非木材林产品的特征及其概念。并根据我国实际情况,初步建立了一个适于我国国情的非木材林产品4级分类框架;第一级分类中将其分为动物类、植物类和微生物类3大类,第

Ultra-dry storage of Dodonaea viscose seeds was studied by orthogonal design including four factors (seed moisture content, packing method, storage temperature and pre-humidification method). Seeds were dried to the moisture contents ranging from 1.12% to 6.13% with silica gel, then stored in hermetic condition combined with different treatments for a year. The germination percentage, electrical conductivity (RC), proline (Pro), malondialdehyde (MDA), superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), total soluble sugar content and fatty acid composition of the stored seeds were tested. The results showed that the seed moisture content had significant effect on germination percentage. The feasible moisture content ranged from 4.28% to 5.25%.The Germination percentage had a significantly negative correlation with the electrical conductivity and proline content, and had significantly positive correlation with the proline content and activity of three antioxidant enzymes. The content of oleic acid an