共查询到20条相似文献，搜索用时 125 毫秒
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在嫩枝扦插床上加扣拱棚以保湿，再在拱棚外喷洒地下水以控温的嫩枝扦插方法，解决了传统嫩枝扦插中光、温、湿的矛盾，改善插穗的生根和生长条件。通过对重瓣黄刺梅当年生半木质化枝条的扦插试验，结果表明：全光水膜控温湿嫩枝扦插技术与传统的小拱棚搭遮阳网方式的扦插、电子喷雾方式的全光雾插相比，生根率和成活率均有显著提高。 相似文献
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几种热带相思树种经大田扦插育苗试验结果表明：在广州地区以秋季进行萌条扦插育苗效果较好。以马占相思、直干大叶相思、厚荚相思萌条作插穗，用１／３火烧土加２／３黄心土作基质，蘸上自配的ＩＢＤ２＃多效生根粉，直接插入育苗容器育苗，苗床用塑料薄膜拱棚加盖遮光度为６０％的黑网以调节控制温湿度及光照，在基质和插穗不消毒、定期淋浇１‰的复合肥水的情况下，扦插成活率分别达６１．８％、８８．８％和６８．９％。其中直干大叶相思扦插易成活且受季节影响较小。 相似文献
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枣树绿枝扦插试验研究 总被引：1，自引：0，他引：1
本试验选用当年生半木质化枣头发育枝作扦插材料，用不同激素、不同浓度进行处理，以河沙做扦插基质；用塑料小拱棚和人工洒水调控温湿度；用竹帘搭棚遮荫简单行的方法，使枣树绿枝扦插当年成活率达８５％以上。冬季采用覆麦草越冬。 相似文献
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药用植物黄花倒水莲组培苗移栽试验 总被引：3，自引：0，他引：3
采用不同基质(轻基质、黄心土+5%钙镁磷肥、细潮沙)、不同遮荫措施(露天遮阳网+塑料小拱棚、林荫下(郁闭度0.5)+塑料小拱棚)进行不同季节(春、夏、秋)黄花倒水莲组培苗移植成活率对比试验。结果表明:轻基质和黄心土+5%钙镁磷的移植成活率较高,分别达85.6%和80.3%;细潮沙的移植成活率最低,只有44.9%。在林荫下采用塑料小拱棚移栽,则春、夏、秋三季的成活率均较高,分别达86.3%、81.4%、85.1%。 相似文献
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土壤益生菌对盆栽马尾松苗生长的影响 总被引：1，自引：0，他引：1
将固氮菌、解磷菌、解钾菌按不同组合接种到盆栽的马尾松幼苗根部,结果表明:2号固氮菌 解磷菌组合处理的苗木高生长比对照增长11.6%;2号固氮菌处理的苗木地径生长比对照增长23.3%;两种固氮菌 解磷菌 解钾菌组合处理的苗木生物量分别比对照增长45.5%和48.8%。而土壤中的N、P、K元素的含量也发生了明显的变化,1号固氮菌则使土壤含氮量增加54.2%,其它处理均使土壤含氮量减少。可溶性磷增加20.0%~50.0%,可溶性钾增加144.4%~277.8%。 相似文献
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利用天然可再生资源没食子酸(GA)与氢化萜烯基环氧树脂(HTME)在一定条件下反应制备了环氧树脂基多元醇(HTME - GA多元醇).通过研究合成反应的影响因素,确定了HTME - GA多元醇的合成反应条件:以GA物质的量12.5倍的正丙醇为反应溶剂,以占HTME与GA总质量2%的季铵盐为催化剂,HTME与GA共沸回流反应3h.经FT - IR、NMR光谱表征了HTME - GA多元醇的化学结构,比较了该多元醇与聚己二异氰酸酯HN90T、改性聚己二异氰酸酯EC385的交联反应特性及交联产物性能.实验结果表明,HTME - GA多元醇与EC385的交联产物具有优良的机械力学性能,与HN90T的交联产物具有较好的耐液体介质性能和硬度,但后者柔韧性较差.随着NCO与OH物质的量比的增大,交联产物的硬度和耐液体介质性能提高. 相似文献
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采取毛竹种子不同方式浸种育苗技术试验。种子选择12年生以上优质母树采种之后其一用50℃温水消毒浸种,其二用1∶1000的多菌灵溶液消毒30min后、再用温水浸种24min,其三用吲哚丁酸500PPM溶液浸种12h即可播种。各试验播种量2kg,播种面积各0.067hm2,用吲哚丁酸500PPM溶液浸种的种子发芽率,比用清水消毒浸种的种子和用多菌灵溶液消毒后温水浸种的种子发芽率分别提高25.40%、16.18%,苗木萌芽出土率也分别提高21.52%、12.94%;苗木生长量苗高分别提高30.77%、17.24%,苗径分别粗24.00%、16.98%,出笋率分别提高55.56%、40.00%,苗竹冠分别增宽大33.85%、19.18%。 相似文献
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对朝阳市不同宜林地类型采取不同树种、不同造林方式进行杨树造林效果调查,结果表明：土层河滩地客土填坑造林方法远远优于原坑土填坑栽植法;薄土层河滩地选择锦新杨造林,其效果好于辽宁杨;厚土层河滩地选择辽宁杨或108杨,造林效果好于锦县小钻杨;地下水位深水型河滩地采取深植法造林的地块“两率”高,林木生长状况良好,远远强于常规造林栽植法;浅水型（或返浆地）河滩地通过筑土埂栽植则能有效地防止水淹或长期浸泡,使树木造林成活后能正常生长;在易受洪水冲袭型河滩地按流水方向呈雁翅形排列定点深植法营造的杨树林分,可有效地防止洪水的冲袭和危害,且保存率高于与主河道呈直角定点挖掘栽植的林地。 相似文献
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Field experiments at two sites in Sweden investigated the possibility of establishing silver birch (Betula pendula Roth) on abandoned fields by planting small (5–10 cm tall) seedlings. The effects of five modes of soil preparation (no preparation, rotary cultivation, deep ploughing, soil inversion, and removal of topsoil) with or without preliminary herbicide weed control on seedling performance were studied for three growing seasons following plantation. Both a split-plot design and a randomized block design were used to evaluate the experiments. Where there was no site preparation, seedling survival was close to nil. The highest seedling survival rates on the site with sandy soil were obtained on sites prepared by removing topsoil, or by transposing it by deep ploughing. On the site with silty soil, the best survival was observed on sites created by soil inversion or rotary cultivation. The tallest seedlings were found on sites with topsoil retained within the soil profile. Herbicide application with glyphosate promoted seedling survival and seedling height in combination with no soil preparation, but was of little effect when followed by mechanical soil preparation. 相似文献
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Yoshiyuki Yanase Yoshihisa Fujii Shogo Okumura Yuji Imamura Tsuyoshi Yoshimura 《Journal of Wood Science》2000,46(3):243-247
To examine the feasibility of using plate-type waveguides for effective detection of acoustic emissions (AEs) from termite attacks in wood, AEs generated by breaking pencil leads or by termite attacks were detected using an AE sensor with a resonant frequency of 140kHz with steel plates of four different sizes and thickness and three AE sensors without them. The larger plates were associated with larger amplitudes of the artificial AEs. The amplitudes of AEs detected by an AE sensor with a steel plate larger than 30×30mm were greater than the average amplitude of the artificial AEs detected by three AE sensors. When detecting AEs generated by the feeding activity of workers,Coptotermes formosanus Shiraki, the cumulative AE events detected by the sensor with a steel plate were much larger than those of the three AE sensors without a plate. Because AE waves are attenuated much less in a steel plate than in wood, it is more effective to attach the AE sensor to wood with a steel plate rather than directly to the wood. These findings suggest that it is feasible to use an AE sensor with a plate-type waveguide for the nondestructive detection of termite attacks in wood. 相似文献