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本文研究了不同播种密度、不同N肥用量度NPK比例与亚麻产量的关系。结果表明，影响云南省冬季亚麻原茎产量的因素从主到次为：播种密度、施肥量、N：P：K；多数产区播种密度应达到220万粒／666．7m^2；少数出苗率和成苗率较高的产区可适当降低播种密度；土壤水解氮140mg／kg左右、有效磷10mg／kg左右、有效钾100ms／kg左右的田块。尿素施用量应控制在15kg／666．7m^2左右，N、P、K的施肥比例应采用2：1：1或1：1：2。 相似文献
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通过对浙江省冬闲田亚麻进行不同品种、播种量、播种方式和肥料用量的四因素正交高产栽培试验表明,影响原茎产量高低的因素为播种量＞播种方式＞肥料用量＞品种,经分析以品种阿里安、播种量4.0kg/666.7m2,撒播和肥料用量N-5.0kg/666.7m2、P2O5-7.5kg/666.7m2及K2O-10.0kg/666.7m2的原茎产量最高.影响种子产量高低的因素为品种＞播种方式＞肥料用量＞播种量,经分析以品种阿里安、播种量3.0kg/666.7m2、撒播和肥料用量N-5.0kg/666.7m2、P2O5-7.5kg/666.7m2及K2O-10.0kg/666.7m2的种子产量最高. 相似文献
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通过对浙江省冬闲田亚麻进行不同品种、播种量、播种方式和肥料用量的四因素正交高产栽培试验表明,影响原茎产量高低的因素为播种量>播种方式>肥料用量>品种,经分析以品种阿里安、播种量4.0kg/666.7m2,撒播和肥料用量N-5.0kg/666.7m2、P2O5-7.5kg/666.7m2及K2O-10.0kg/666.7m2的原茎产量最高。影响种子产量高低的因素为品种>播种方式>肥料用量>播种量,经分析以品种阿里安、播种量3.0kg/666.7m2、撒播和肥料用量N-5.0kg/666.7m2、P2O5-7.5kg/666.7m2及K2O-10.0kg/666.7m2的种子产量最高。 相似文献
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为优化亚麻栽培技术,提高亚麻原茎产量,试验通过二次正交旋转设计分析了有效播种密度、氮肥、磷肥、钾肥对冬播亚麻原茎产量的影响。发现供试条件下,各因素对亚麻原茎产量的影响大小顺序为有效播种密度（X1）〉氮肥（X2）〉钾肥（X4）〉磷肥（X3）,不同肥料间互作不显著。并得到优化后的亚麻高产栽培方案：有效播种密度在3454.8-3502.3万粒/hm2,N263.2-337.7kg/hm^2,P2O5用量75.5-99.7kg/hm^2,K2O用量242.5-316.8kg/hm^2。 相似文献
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本文对浙江冬闲田种植亚麻的高产栽培技术进行了试验.结果如下选择排灌方便的田块,选种高产抗寒品种阿里安,晚稻收割后,及时早播,一般在12月上中旬播种;做好杂草防治工作,芽前封土处理以72%都尔乳油的效果较好,持效期长,施用量为130ml/666.7m2.苗后防治的药剂可选择10.8%高效盖草能乳油、5%禾草杀星、17.5%快刀乳油,用药量为60ml/666.7m2,在亚麻出苗20-30天(此时杂草约在2-3叶期)兑水50kg喷雾;肥料(复合肥)施用总量为30kg/666.7m2,合理分配基追肥的比例,可为21;后期要防止倒伏,及时收获. 相似文献
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为获得适合云南省宾川县及类似环境条件下的亚麻高效栽培技术,利用6因素5水平正交设计试验研究了不同品种、种植密度、施肥量、抗旱剂及其组合(共计25个处理)对原茎产量、籽粒产量以及各农艺性状的影响。结果表明,25个处理的原茎产量在11 850～14 750 kg/hm2,不同处理之间的原茎产量无显著差异,籽粒产量范围为1100～2267 kg/hm2,处理间存在极显著差异。从各因素不同水平之间的多重比较结果来看,亚麻品种对原茎产量、籽粒产量和分枝数的影响最为显著,氮肥可显著影响亚麻株高,磷肥对亚麻蒴果数影响较大,钾肥则会显著影响亚麻茎粗,抗旱剂会显著影响亚麻工艺长度,而种植密度对亚麻产量的影响在一定范围内不显著,播种密度在1600～2650粒/m2的水平下均可达到高产。综合比较分析,在使用亚麻品种5f069,播种密度为2300粒/m2的条件下,施氮(N)12 kg/hm2、磷(P2O5) 27 kg/hm2、钾(K<... 相似文献
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亚麻是北方旱区重要的油料作物。论文采用"3414"试验设计,研究了旱地亚麻N、P、K肥效应及适宜的肥料用量。结果表明,N、P、K配合施用显著提高了亚麻产量,三因素增产大小顺序为NPK;在该试验条件下,N、P_2O_5、K_2O用量分别为45.00、33.75、37.50 kg/hm~2时,N、P、K肥利用率最大,分别为8.38、11.85、14.93 kg/kg。一元二次肥料效应模型模拟结果显示,旱地亚麻N、P_2O_5和K_2O适宜施用量分别为41.85、82.95、37.50 kg/hm~2。 相似文献
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在调查研究基础上,结合生产实际,提出了高寒地区亚麻栽培生产中应注意的几个问题:1.选择腐殖积累多,有机质含量高的黑土,并注意合理轮作。2.搞好整地保墒,这是播种保全苗的关键。3.控氮增磷稳钾,促进纤维品质提高,防止亚麻倒伏。4.适时播种、合理密植,黑龙江南部可在5月5日、北部可在5月10日结束播种;有效播种粒数为1800-2000粒/m2,保苗不低于120万株/666.7m2。5.控制杂草,搞好病害预防工作。6.及时收获。 相似文献
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Krishna Kumari S Thayumanavan B 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,53(1):47-56
Scanning electron microscope (SEM) pictures of small millet starch granules showed more large polygonal and few small spherical or polygonal granules. The granules of small millets resembled those of rice starch granules. The size of the starch granules ranged from 0.8–10 m. The size of the granules was larger in barnyard millet and smaller in proso millet. Several granules showed deep indentation caused by protein bodies. SEM of starch isolated from 24 hour-germinated kodo millet showed pitting or pinholes at some points due to the attack of amylases (preferentially on bigger granules). Brabender viscoamylograph studies on small millet starches revealed that the gelatinization temperatures ranged from 75.8 to 84.9 ° C. Barnyard millet possessed lower amylograph viscosity, minimum breakdown, and relative breakdown values when compared to the other small millets. 相似文献
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Effects of timing and rate of N fertilizer application on concentrations of P, K, S, Ca, Mg, Na, Cl, Mn, Fe, Cu and Zn in herbage from perennial ryegrass/white clover pastures were studied at two sites in south-western Victoria, Australia. Nitrogen fertilizer (0, 15, 25, 30, 45 and 60 kg ha–1 ) was applied as urea in mid-April, early May, mid-May, early June and mid-June 1996 to pastures grazed by dairy cows. At Site 1, N fertilizer resulted in a linear increase in P, K, S, Mg and Cl concentrations in herbage and a linear decrease in Ca concentration. For all times of application, concentrations of P, K, Ca, Mg and Cl in herbage increased by 0·0048, 0·08, −0·010, 0·0013 and 0·053 g kg–1 dry matter (DM) per kg N applied respectively. For S concentration, maximum responses occurred in mid-May (0·012 g kg–1 DM per kg N applied). At Site 2, N fertilizer resulted in a linear increase in P, S and Na concentrations in herbage, a linear decrease in Ca concentration and a curvilinear increase in K and Cl concentration. The maximum responses for P, S and K concentrations in herbage occurred for the N application in mid-June and were 0·015, 0·008 and 0·47 g kg–1 DM per kg N applied respectively. For Cl concentration, the maximum response occurred for the N application in early June and was 0·225 g kg–1 DM per kg N applied. Overall, applications of N fertilizer up to 60 kg ha–1 did not alter herbage mineral concentration to levels that might affect pasture growth or animal health. 相似文献
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W. L. Porter 《American Journal of Potato Research》1967,44(10):382-382
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Various parameters,e.g. types of microtiter plate for DAS-ELISA (double antibody sandwich-enzyme-linked immunosorbent assay), use of fresh or frozen amplifier solutions for enzyme-amplified-ELISA, and use of sodium diethyldithiocarbamate (NaDIECA) in sample buffer in cocktail-ELISA were evaluated for the detection of potato viruses A, M, S, X, Y and leafroll from potato foliage. Dynatech Immulon immunoplates provided higher readings for all viruses. Fresh amplifier solution in amplifed-ELISA was superior to frozen solutions. Amplified ELISA gave only marginal improvement in the sensitivity over the standard DAS-ELISA. Addition of NaDIECA in sample buffer did not improve the detection of viruses in DAS-, amplified-, or cocktail-ELISA. Cocktail-ELISA can reduce antigen incubation time to as short as 15 min for PVA, PVM and PVX; 1 hr for PVY and PLRV; and 2–4 hr for PVS using pre-coated plates. Although amplified-ELISA is slightly more sensitive than DAS-ELISA for certain potato viruses, it is not suitable for large-scale indexing of potato viruses in Seed Certification Laboratories, in view of the additional steps needed in carrying out this procedure. 相似文献
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The milling potential of hulled barley, hulled oat, triticale, rye and wheat was studied using a long tempering process and a laboratory four-roller mill. Regardless of the investigated cereal, the results indicated a significant influence (p < 0.05) of volume per surface area ratio on the milling yield and ash contents of the flour. The lowest milling yield was obtained in case of hulled oat. Solvent retention capacity profiles were determined for all investigated whole cereals and flours for predicting the contribution of different polymers to the functionality of samples. For all solvents higher values were obtained for the whole cereals compared to the corresponding flour. Thermo-mechanical properties of the whole cereals and refined flours were also investigated. If in case of wheat the gluten proteins play an essential role on dough behaviour during kneading at 30 °C, in case of triticale, rye, hulled barley and hulled oat, the fibers play a major role as well. Thermo-mechanical properties of starch registered a large variation between cereals and/or flours. The lowest torque value corresponding to starch gelatinization (C3) was registered in case of the hulled oat flour, 1.92 Nm, while the highest value in case of rye flour, 2.65 Nm. 相似文献
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Study of antimicrobial activity of aloevera, chitosan, and curcumin on cotton, wool, and rabbit hair 总被引：1，自引：0，他引：1
Aloevera, chitosan, and curcumin were applied in alone and in combination with each others on cotton, wool and rabbit hair
by exhaustion method for the assessment of their antimicrobial activity. The antimicrobial activity of these natural ingredients
was better in peroxide treated cotton, formic acid treated wool/rabbit hair fibrous substrates than their corresponding intact
ones. Aloevera shown better antimicrobial activity than chitosan and curcumin when applied alone and its antimicrobial activity
was enhanced by addition of both chitosan and curcumin. The application of aloevera+chitosan+curcumin combination on peroxide
treated cotton and formic acid treated wool/rabbit hair fibrous substrate was fast up to twenty five washing cycles. 相似文献
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The concentration of mineral elements in herbage from permanent swards of mixed species composition (predominantly Agrostis spp., Holcus lanatus, Festuca rubra, Lolium perenne, Poa spp., etc.) was compared with that from sown perennial ryegrass ( Lolium perenne ) at two fertilizer rates (0 and 300kg N ha−1 year−1 , both with P and K) and with L. perennel Trifolium repens (at 0 N with P and K). The investigation was conducted over four years at sixteen contrasting sites in England and Wales. Herbage samples for mineral analysis were taken at first and fourth harvests (May and August) each year from plots under 4-weekly cutting. There was a wide degree of variation between sites, particularly for concentrations of Ca, Mg, Na and all trace elements analysed. Herbage from L. perenne reseeds had significantly higher concentrations of Ca, Mg, Na, Co and S, but K, Mo, Zn, Cu and P were generally lower than in the permanent swards. L. perennel T. repens swards had the highest concentration of major cations, but trace element levels were generally intermediate between those for 0 N permanent and L. perenne swards. Fertilizer N reduced concentrations of Ca, Mn, Mo and S, and increased Mg, Na and Zn, with no consistent effects on K, Co and Cu. Herbage at harvest 4, compared with harvest 1, had higher Ca, Mg, Na, Mn, Zn and S. Permanent and L. perenne swards responded similarly to fertilizer N and between harvest dates. Results are discussed in relation to previous reports of botanical and fertilizer effects on mineral concentrations, and the mineral requirements of livestock. Changes in mineral concentration resulting from reseeding permanent swards are considered unlikely to increase mineral-related livestock disorders, and in many cases could be beneficial, though problems might arise on sites where some elements, e.g. Cu and Mg, are low. 相似文献