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1.
将污泥堆肥与园土按一定比例混合作为一串红的栽培基质,研究了污泥堆肥对一串红生长发育的影响,表明最适合一串红的污泥堆肥基质配方为:污泥堆肥50%、园土50%。  相似文献   

2.
本试验研究了 N H4- N、 N O3- N、尿素及其不同比例对温室内一串红幼苗生长发育的影响。通过二年的试验表明,施用 N H4- N 可促进秋冬季一串红幼苗的生长,可提早开花。施用尿素的一串红的幼苗在秋冬季生长不良,但在春季生长良好。本试验研究了各处理对一串红叶片中可溶性糖含量,叶绿素含量、光合强度及多种矿质元素含量的影响  相似文献   

3.
试验研究了温度,基质及施用营养液等对厚皮甜瓜西薄洛托试管苗移载成活及生长的影响,结果表明,试管苗根小于1cm时移载最好,适宜移载温度(苗床气温)是白天25-30℃,液间15-18℃;移载基质以蛭石:草炭土=2:1的混合基质较优,适当施用营养液可加速幼苗生长,提高成活率,尤其是以在移载基质无营养的条件下更显重要。  相似文献   

4.
采用田间试验方法,研究不同营养基质和不同苗期管理措施对山杏容器苗生长的影响,结果表明:试验所用各种营养基质对山杏容器苗生长有显著影响,其中,基质1、2(羊粪、鸡粪为底肥)培育的山杏容器苗木的高、径、根系生长量最高。苗期追施5%复合肥,在播种后50天和60天左右进行打尖、移床处理可有效提高苗木质量。  相似文献   

5.
本测定了4个季节的大型人工湿地中基质无机氮含量,以研究植物组成与多样性(包括植物物种丰富度与功能群丰富度)对基质无机氮的季节动态的影响。方差分析表明:在大型人工湿地中,当衡量植物多样性对基质营养季节动态的影响时,一般是植物组成和物种丰富度要比功能群丰富度更有说服力。同时,基质无机氮夏季(2008年7月,一年中植物生长最快的季节)的值最高,春季(2008年4月,植物开始生长)的无机氮最低,这表明基质营养(如无机氮)的季节动态变化趋势与植物的生长周期及其对营养需求规律相吻合。  相似文献   

6.
通过3种基质配比进行美国紫薇“红火箭”扦插繁殖比较试验,结果表明:以田园土、珍珠岩、泥炭(体积比为8∶1∶1)配制的基质进行扦插繁殖,10个月后的种苗成活率和株高生长量为88.7%和105.81 cm ,明显好于以营养土、蛭石、珍珠岩(体积比为7∶1.5∶1.5)配制的基质和用营养土、田园土、珍珠岩(体积比4∶5∶1)配制的基质,后2种基质配比对扦插繁殖的影响无明显差异;3种基质配比对扦插苗的地径生长无明显影响。这表明,采用3种基质配比进行美国紫薇“红火箭”扦插繁殖,用田园土、珍珠岩、泥炭配制的基质效果最佳。  相似文献   

7.
应用生长界面标记技术,标记不同调制电流密度通过固—液界面生长的区域,用离子探针测量各区域中溶质Y的相对浓度,得到在±7mAcm~(-2)的调制电流密度范围內,Y的相对浓度与调制电流密度成正比。并研究了二个不同周期的交变的调制电流或一个给定周期的调制电流和一个溫度波动同时引入生界面对溶质Y分凝影响,观察到二种不同周期的波动在生长界面耦合形成的复杂调制结构的生长层。  相似文献   

8.
海洋胶体中的氮、磷和铁对微藻生长的效应   总被引:12,自引:0,他引:12  
利用错流超滤技术提取海洋胶体,研究了无氮、无磷和无铁的营养介质中海洋胶体对海水小球藻、亚心形扁藻和球等鞭金藻生长的影响.结果表明,在胶体有机碳(COC)浓度为0~238.4 μmo1/L的范围内,3种微藻在以胶体为N源的介质中的平均相对增长率Y分别为20.7%~44.0%,80.1%~110.1%和68.6%~106.2%;在以胶体为P源的介质中的Y值分别为19.3%~43.2%,78.3%~156.7%和77.9%~115.3%.3种微藻的Y值随COC浓度增大呈下降趋势.3种微藻在以胶体为Fe源的介质中的Y值分别为12.7%~35.3%,171.7%~266.3%和400.5%~498.8%,3种微藻的Y值随COC浓度增大呈线性上升.这意味着海洋胶体中存在微藻生长必需的N,P和Fe营养,对微藻的生长有显著的刺激作用.胶体中的Fe营养对球等鞭金藻和亚心形扁藻的效应比N和P营养的约大6~7倍,而胶体中的N和P营养对小球藻的促进作用则约比Fe的大3倍.  相似文献   

9.
采用在育苗营养土中搀入黄粉虫粪的方法营养土中黄粉虫粪搀入量对马坊营旱黄瓜幼苗生长的影响。结果表明:黄粉虫粪与营养土按1∶160~320(体积比)混配的基质进行黄瓜育苗,能促进幼苗生长,显著提高幼苗简单指标、相对指标和复合指标的值。  相似文献   

10.
试验以葵花杆、玉米秸、蘑菇渣和锯末等农产废弃物为主要原料,配制成不同的混合基质,通过连续种植三茬番茄,比较了6种不同的混合基质对番茄生长和产量的影响;同时通过盆栽试验,比较了不同的单一基质对番茄产量的影响及在番茄栽培过程中基质物理性状的变化.试验结果表明基质在重复利用的过程中,混合基质和单一基质对番茄生长和产量的影响具有相同的趋势,即在第一茬,混合基质或单一基质之间番茄生长和产量差异明显,种植一茬番茄以后,基质之间番茄生长和产量差异逐步缩小;葵花杆、玉米秸、蘑菇渣3种基质的分解速度远远快于草炭和锯末,因而利用葵花杆、玉米秸、蘑菇渣3种材料配制的混合基质,在作物收获后必须添加新基质.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

15.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

16.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

17.
以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.  相似文献   

18.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

19.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

20.
Quality traits in wheat (Triticum aestirum L.) were studied by quantitative trait locus (QTL) analysis in a recombinant inbred line (RIL) population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross (ChSh). Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.  相似文献   

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