共查询到20条相似文献，搜索用时 890 毫秒
1.
小兴安岭伊春林区具有丰富的松树资源。松树的药用代表部位松针富含多种维生素、氨基酸和微量元素。松针中丰富的"前花青素",具有提高人体免疫力,抗衰老等功效。文章介绍了松针资源概况,松针茶的药用价值及松针茶的制作工艺,向人们展示这一神奇的保健饮品。 相似文献
2.
通过对松针及松针提取精油后的废渣的成份分析比较得出,提取精油过程并没破坏或减少松针的营养成份。废渣经干燥、粉碎,完全可以做为饲料添加剂,用在禽、畜饲料上,这为充分利用林区资源,开发饲料资源,开辟了新的途径。 相似文献
3.
4.
5.
7.
松针是松树的叶子,含有天然抗氧化物和丰富的维生素、氨基酸。本文介绍了松针油、松针浸膏以及松针粉的提取工艺和用途,为人们综合利用松针开阔了眼界。 相似文献
8.
松针资源开发利用探讨 总被引：1，自引：0，他引：1
松针是松科常绿乔木针叶的统称 ,其中包括 :华山松 ( Pinus armandii Franch.)、湿地松 ( P.elliotiiEngelm.)、马尾松 ( P.massoniana Lamb.)、油松 ( P.tabulaeformis Carr.)等。这些树在南岳衡山大片栽培 ,树干高大 ,在采伐利用的时候嫩枝针叶皆被遗弃。在我们对松针的开发利用研究中发现 ,从针叶中可以提取天然绿色素——松针叶素锌钠盐 ,还可以提取独具芳香气味的天然香料——浸膏和精油 ,同时松针中含有大量的粗蛋白、粗脂肪、维生素和氨基酸等成分 ,是良好的饲料添加剂。利用松针为原料研究生产具有高经济附加值的产品具有重大的… 相似文献
9.
11.
12.
The colonization and lignin decomposition of pine (Pinus thunbergii and Pinus densiflora) needle litter by an endophytic fungus, Lophodermium pinastri, was examined with field observations, a field experiment and laboratory experiments. In pine needles collected from the field, needle mass per length and lignin content were lower in needle portions bearing Lophodermium fruiting bodies than in the remaining needle portions, whereas total carbohydrate content was not different between them. Total and live hyphal lengths were greater in needle portions bearing Lophodermium fruiting bodies than in the remaining needle portions. Lophodermium fruiting bodies were not formed on sterilized needles after a 6‐month incubation on the forest floor, whereas they formed on 20% of non‐sterilized needles, indicating that this fungus can only colonize live needles on the branch. In pure culture decomposition tests, mass loss of lignin was detected for several isolates of L. pinastri, but was variable among isolates and between the needles of two pine species. A comparison of the rDNA‐internal transcribed spacer sequences between L. pinastri isolates of P. thunbergii and P. densiflora indicated that the two groups were phylogenetically separated. This study is the first to show that L. pinastri has the ability to decompose lignin in dead pine needles. 相似文献
13.
The biology of Lophodermella conjuncta on Corsican pine needles was studied. Results of a spore exclusion experiment and histological examination of needles indicated that infection of young current years needles occurred and that the fungus first colonized only the endodermis. Infection remained latent until symptoms developed, from hyphae penetrating the mesophyll from the endodermis, in July of the year following infection. Ascocarps were produced on second year needles by mid-August. Aseospores were trapped throughout the year.Infected needles were cast prematurely during the third season. The phenomenon of latent infection of pine needles by some pine needle fungi is discussed. 相似文献
14.
Edwards NT 《Tree physiology》1989,5(4):507-509
Simple holders for positioning pine needles in a gas exchange cuvette are described. The holders make it easy to enclose a standard length of needles in the cuvette in a single plane without mutual shading. The holders also make it possible, following gas exchange measurements, to harvest for further analysis just those needle portions that were enclosed in the leaf chamber. Field observations, which were made with a gas exchange cuvette incorporating the needle holders, on the relationship between carbon exchange rate and photon flux density in loblolly pine (Pinus taeda L.) needles are reported. 相似文献
15.
Katri Ots Aigars IndriksonsIveta Varnagiryte-Kabasinskiene Malle MandreTatjana Kuznetsova Jaan KlõšeikoMari Tilk Kadri KõresaarAljona Lukjanova Karin Kikamägi 《Forest Ecology and Management》2011,262(2):82-87
Studies were carried out in 1999, 2005 and 2007 in the area of Kunda cement plant in Northeast Estonia on sample plots 3 km W and 2.5 and 5 km E of Kunda. As control stands, two plots for pine and spruce were established in Lahemaa National Park (34-38 km W of Kunda). The selected pine and spruce stands were 75-85-year-old Myrtillus site type, of 0.7-0.8 density and II quality class, with moderately dense or sparse understorey. The values concerning needle density and number of needle scars were higher for shoots formed in the period of higher pollution than for the shoots grown under a considerably lower pollution load. Although the cement dust pollution has notably decreased from year to year, the number of needle pairs per 1 cm of the shoot was 1.8-2.1 times greater in the shoots formed in 1998 than in those formed in 2003, whereas the changes were statistically reliable. Possibly the low temperatures at the time of shoot and needle formation affected the density of needles on all sample plots, and thus the number of needles on shoots formed in 2003 was many times smaller. After the significant fall in the pollution load since 1996 the length growth of needles intensified around Kunda cement plant, at the same time no changes occurred in the length growth of needles in the control area. As compared to the data from 1998, the length growth of pine needles had improved, especially 2.5 and 5 km E from the cement plant, needles being respectively 1.5 and 1.1 cm longer than 6 years ago. The stimulation of the growth of pine and spruce needles 2.5 and 5 km E of the cement plant may be a sign of a positive effect of reduced doses of cement dust in soil. The greater length of pine and spruce needles is the reason for the larger biomass of the needles. 相似文献
16.
Variation in annual radial and height increments (RI and HI, respectively) as well as the number of needles belonging to different needle sets of successive annual shoots, determined by the needle trace method (NTM), was studied retrospectively in Scots pine stands, one in southern Finland and two in Estonia. The connection between different needle sets and tree growth was studied by correlation and covariance analyses. The numbers of needles of the three youngest needle sets were positively correlated with growth, whereas the number of needles older than 3 years had no significant correlation. The covariance analysis emphasized the negative relationship of older needle sets with tree growth. It is generally concluded that the two or three youngest needle sets are important and all older needles minimally contribute to growth, possibly because of their small quantity. Older needles may remain on the tree if assimilation is impeded for some reason, e.g. due to premature loss in the two youngest needle sets. The trees having attached old needles grew less than those that had already totally lost these needle sets. 相似文献
17.
Succession and pathogenic properties of fungi inhabiting pine needles . Isolates from healthy and dying pine needles of various age permit conclusions about the relationship of some needle fungi to their host. Of the six most prevalent fungi, only Lopbodermium seditiosum has a pathogenic nature. 相似文献
18.
Inter-specific competition and management modify the morphology, nutrient content and resorption in Scots pine needles 总被引：1，自引：1，他引：0
Irantzu Primicia J. Bosco Imbert M. Carmen Traver Federico J. Castillo 《European Journal of Forest Research》2014,133(1):141-151
Influence of tree-to-tree competition on nutrient resorption is still not well understood. To contribute filling this gap, we assessed the effects of thinning (0, 20 and 30 % extraction of basal area) and canopy type (beech–pine vs. pine subplots) on needle dry weight, needle length, nutrient content and nutrient resorption (N, P and K) in Scots pine (Pinus sylvestris) needles of different cohorts, 8–9 years after thinning. Thinning and canopy type often concurrently affected needle morphology (e.g. lighter and shorter needles in 30 % thinning, heavier and longer needles in pine canopy on the first year of study) and nutrient content (e.g. decrease in N, P and K in 30 %; N, P and K higher in pine canopy on the first year of study). However, effects of thinning appeared only in older cohorts for N and P but were found in old and new cohorts for needle dry weight, needle length and K, indicating that some thinning effects remained after 8–9 years. Canopy effects on morphology and nutrient content were more frequent in recent cohorts, in relation to an increase in beech cover over time. While no clear effects of thinning on the nutrient resorption were observed, higher values were observed in the pine than in the mixed canopy, which could be related to a higher Scots pine stem growth in those patches. The observed differences between treatments will likely increase as the stand develops, probably leading to beech trees being dominant, and as future thinnings are carried out. 相似文献
19.
20.
《Scandinavian Journal of Forest Research》2012,27(6):501-510
Scots pine ( Pinus sylvestris L.) and Norway spruce [ Picea abies (L.) Karst.] seedlings were exposed to high phosphorus (HP) or low phosphorus (LP) availability for one growing season in the open field, and to combined P availability and elevated ozone (O 3 ) concentrations (0, 55, 110 and 210 ppb for Scots pine and 0, 40, 75 and 150 ppb for Norway spruce, respectively) for 28 days in controlled laboratory chambers. Compared with HP, the LP treatment reduced Scots pine current-year (C) shoot and root dry masses and Norway spruce total dry mass, whereas the highest O 3 concentrations increased the magnesium concentration of Scots pine C needles and P concentrations of the C needles of both tree species. Chlorophyll a, a+b and carotenoid concentrations of Scots pine C needles were significantly higher in the LP treatment compared with HP under the highest O 3 concentration (210 ppb). In the mesophyll tissue of C needles of both tree species, LP treatment increased the size of mitochondria and elevated O 3 -induced granulation of chloroplast stroma and disintegration of cytoplasm. Exposure to elevated O 3 concentrations increased swelling of chloroplast thylakoids and reduced the amount of vacuolar tannin in the LP Scots pine C needles. The results suggest disturbances in needle photosynthetic machinery due to acute exposure to the combination of elevated O 3 and low P availability. However, clear additive effects were found only in needle P concentrations < 1 mg g -1 in short-term O 3 exposure. 相似文献