共查询到17条相似文献,搜索用时 640 毫秒
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报告概述了纳米增效肥的研究历程,并对纳米增效肥的增产机理进行了探讨,同时详细讲解了验证纳米增效肥增产机理所采用的试验方法。在杂交稻上的试验表明,纳米增效肥可促进农作物产量的大幅度提高,改善农作物的品质,并可节省30%~40%的施肥量。该项新技术,填补了国内外纳米材料在农业应用领域上的空白,为现代化农业生产发展做出了重要贡献。 相似文献
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腐植酸生物菌肥对保护地次生盐渍化土壤改良效果研究 总被引:1,自引:0,他引:1
利用解淀粉芽孢杆菌和粉状毕赤酵母菌接种到褐煤腐植酸中,经好气性发酵生产出生物菌肥,应用于保护地次生盐渍化土壤改良。结果表明,保护地土壤理化性状显著改善,土壤微生物数量明显增多,生物量碳、土壤的呼吸作用和酶活性也有一定增加;土壤中南方根结线虫数量明显减少,有益的小杆线虫数量增多;黄瓜666.7 m2产量9918.4 kg,比CK增产22.61%;黄瓜根系中根结比率降低;黄瓜长势良好,未出现盐渍化危害症状。 相似文献
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腐植酸复合肥对旱作玉米生长及土壤物理性质的影响 总被引:1,自引:0,他引:1
利用腐植酸保水剂与氮、磷、钾肥料制成了腐植酸复合肥,并将该肥在半干旱区进行了玉米田间水肥耦合试验。试验结果表明:腐植酸复合肥使玉米株高增加、根系活力增强、叶绿素含量增加,为玉米优质高产奠定了基础。腐植酸复合肥处理与NPK复合肥处理相比,玉米不同生长期植株体内含磷量均增加,差异达极显著水平,说明施用腐植酸复合肥,使肥料中的磷活性增加,磷的利用率明显提高。施用腐植酸复合肥后,土壤团粒结构、土壤水分含量均增加,说明施该肥后,改善了土壤的物理性质。综上所述,腐植酸复合肥通过改善土壤物理性质和增效肥料,促进水肥耦合效应,促进了玉米生长和增产。 相似文献
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肥料添加纳米碳在水稻上的施用效果 总被引:4,自引:0,他引:4
肥料添加纳米碳在水稻主产区5个地点的应用效果表明:100%常规肥料添加纳米碳处理与100%常规肥处理相比,产量平均增幅为9.5%;常规肥料添加纳米碳在节氮30%~50%的情况下,与100%常规处理相比,产量平均增幅为11.3%;常规肥料添加纳米碳处理比100%常规肥处理每公顷均有数百到数千元的经济效益。 相似文献
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介绍超级杂交水稻应用营养套餐施肥技术和示范试验结果,667 m2产量达到867.17 kg,比常规施肥对照区增产34.41%。主要增产因素是施用了高效优化的高科技肥料——含硅、锌养分的腐植酸复合肥和高效叶面肥,充分满足了水稻超高产栽培的营养需求。 相似文献
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以通州区石灰性灰潮土为供试土壤,研究了不同施磷水平对土壤速效磷含量及水稻产量的影响,测定了水稻不同施磷水平下磷肥的利用率。结果表明,在中等含磷的土壤上,石灰性灰潮土的磷肥系数为1.72,磷肥临界值为6.0 mg/kg;水稻合理施用磷肥能显著增产,但产量只在一定的施磷水平下随着施磷量的增加而增加,其667 m2最经济施磷量为3.8 kg,最高产量施磷量为9.4 kg。磷肥利用率则随施磷量的增加而逐渐下降,平均利用率为8.5%。 相似文献
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H.U. Neue R. Wassmann H.K. Kludze Wang Bujun R.S. Lantin 《Nutrient Cycling in Agroecosystems》1997,49(1-3):111-117
Understanding the major controlling factors of methane emissions from ricefields is critical for estimates of source strengths.
This paper reports results on the relationship of different plant characteristics and methane fluxes in ricefields.
Methane fluxes in ricefields show distinct diel and seasonal variations. Diel variations are mainly controlled by soil solution
temperature and the partial pressure of methane. One or two distinct seasonal maxima are observed in irrigated ricefields.
The first is governed by methane production from soil and added organic matter and a second at heading is plant derived. During
ripening and maturity, root exudation, root porosity and root oxidation power may control methane emission rates. Rice plants
play an important role in methane flux. The aerenchyma conduct methane from the bulk soil into the atmosphere. The amount
of carbon utilized in methane formation varied among cultivars. A strong positive effect of rice root exudates on methane
production imply that cultivar selections for lower methane emissions should not only be based on the gas transport capabilities
but also on the quality and quantity of root exudates.
Soils show a wide range of methane production potential but no simple correlation between any stable soil property and methane
production is evident. Various cultural practices affect methane emissions. Defined aeration periods reduce methane emissions.
Soil entrapped methane is released to the atmosphere as a result of soil disturbances. Mineral fertilizers influence methane
production and sulfate containing fertilizer decrease methane production. The methane release per m2 from different rice ecosystems follow the order: deepwater rice>irrigated rice>rainfed rice. Abatement strategies may only
be accepted if the methane source strength of ricefields is reliably discriminated and if mitigation technologies are in accordance
with increased rice production and productivity.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献