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河南省小麦、玉米及蔬菜优质高产高效平衡施肥 总被引:4,自引:0,他引:4
介绍农作物高产优质施肥技术的田间试验研究情况。田间试验结果表明:小麦在氮磷肥配施时(N270kg/hm2、P2O5120kg/hm2),K2O最佳用量为180kg/hm2,小麦最高产量达6880kg/hm2;玉米在氮磷肥配施时(N225kg/hm2、P2O5120kg/hm2),K2O最佳用量为180kg/hm2,玉米最高产量达7640kg/hm2;萝卜在氮磷肥配施时(N300kg/hm2、P2O5225kg/hm2),K2O最佳用量为300kg/hm2,萝卜最高产量达79860kg/hm2;白菜在氮磷肥配施时(N300kg/hm2、P2O5225kg/hm2),K2O最佳用量为300kg/hm2,白菜最高产量达95050kg/hm2。 相似文献
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粉煤灰磁化肥施用于大豆田的试验表明 :粉煤灰磁化肥比习惯用肥增产 15 .2 % ,亩增产 15 .2kg ;比等量N ,P ,K混合肥增产 4.5 % ,亩增产 4.9kg ;最佳产量的粉煤灰磁化肥的施用量为 49kg/亩 ,亩产量达 12 7.18kg。 相似文献
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玉米施用粉煤灰磁化肥的效应方程及肥效 总被引:1,自引:0,他引:1
粉煤灰磁化肥施用于玉米作物试验表明 :该肥在玉米上一般用量为 917.90kg/hm2 左右 ,比对照增产 5 .3~ 65 .0 % ,增产 675 0~ 85 87.5kg/hm2 ,比当地农民习惯施肥措施增产 5 .7~ 12 .5 % ;增产 466.5~ 93 0kg/hm2 ;比未磁化粉煤灰复混肥增产 0 .5 9~ 8.2 % ,增产 49.5~ 63 7.5kg/hm2 。最高产量施用粉煤灰磁化肥为 10 5 5kg/hm2 ,玉米产量为8895 .62kg/hm2 ;最佳产量施用粉煤灰磁化肥为 917.90kg/hm2 ,玉米产量为 883 4 .5 3kg/hm2 。 相似文献
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新型多元素螯合肥对冬小麦增产效果的影响 总被引:1,自引:0,他引:1
《化肥工业》2017,(4)
新型多元素螯合肥具有活化土壤、提高肥料利用率、改善土壤板结、培肥地力等作用。试验研究了新型多元素螯合肥在冬小麦上的增产效果,结果表明其可以显著提高冬小麦的产量,其中较等养分复合肥增产404.2 kg/hm~2,增产率5.1%;较农民习惯施肥增产923.8 kg/hm~2,增产率12.4%;较不施肥处理(CK)增产2 433.0 kg/hm~2,增产率41.1%。 相似文献
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《农药》2021,(7)
[目的]研究41.7%氟吡菌酰胺SC在甘薯上的防病增产效果。[方法]通过栽插时浇穴和栽插前药泥蘸根处理,生长期调查作物长势,收获期调查产量和病害的发生情况,对41.7%氟吡菌酰胺SC的防病增产效果进行分析。[结果]41.7%氟吡菌酰胺SC各处理田间栽插后对甘薯前期的生长具有一定的促进作用;41.7%氟吡菌酰胺SC各处理均有显著的增产效果,比对照增产96%以上,与田间常用防治甘薯茎线虫病药剂3.5%阿维·噻唑膦颗粒剂相比增产17%以上;41.7%氟吡菌酰胺SC各处理(750 mL/hm~2浇穴、1005 mL/hm~2浇穴、1005 mL/hm~2蘸根、2010 mL/hm~2蘸根)对甘薯茎线虫病防治效果(病情指数计算分别为81.13%、83.66%、73.60%、78.46%)均优于对照药剂3.5%阿维·噻唑膦颗粒剂(68.83%),对甘薯软腐病防治效果(61.68%、61.85%、70.89%、75.60%)显著优于3.5%阿维·噻唑膦颗粒剂(5.13%),对甘薯黑斑病的防治效果(60.53%、78.73%、76.49%、82.66%)均显著优于3.5%阿维·噻唑膦颗粒剂(42.32%)。[结论]41.7%氟吡菌酰胺SC无论浇穴还是蘸根各处理对甘薯生长均具有一定的促进作用,有显著的增产效果,对甘薯茎线虫病、软腐病和黑斑病均有较好的防治效果。 相似文献
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以黄瓜品种“津研7号”为供试材料,研究腐植酸套餐肥对设施黄瓜农艺性状、产量及品质等的影响。结果表明:在减少施肥量的情况下,腐植酸套餐肥与常规施肥相比,黄瓜SPAD值平均提高1.77%,茎粗平均提高2.50%,株高平均提高6.07%,黄瓜增产11.06%,产投比平均提高5.41%,Vc含量提高14.90%。说明腐植酸套餐肥提高了光合作用速率,增强了作物生长势及抗逆性,提高了黄瓜的产量与品质。同时,施腐植酸套餐肥的土壤有机质、有效磷、速效钾含量均显著优于常规施肥,降低了土壤pH值,改善了土壤环境。因此,腐植酸套餐肥能够达到减肥增效、增产提质、改善土壤的目的,产投比明显高于常规施肥,平均每667 m2增收982元;可提高农户种植的收益和积极性。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献