共查询到18条相似文献,搜索用时 203 毫秒
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连续施用生物炭对棕壤磷素形态及有效性的影响 总被引:5,自引:1,他引:4
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针对南方酸性稻作土壤专性吸附和固定磷素能力强的问题,采用微区试验,以正常施磷(75 kg/hm2)不施生物炭为对照,探讨不同磷肥水平(P2O5 75、60、45、30 kg/hm2)和生物炭配施(40、60、80 t/hm2)对土壤不同形态磷素含量的影响。结果表明:(1)减磷施肥配施生物炭后全磷、有效磷、树脂磷、碳酸氢钠无机磷及稀盐酸磷的含量显著增加,残留态磷的含量显著降低。(2)磷肥水平≥45 kg/hm2时,配施生物炭处理的全磷和有效磷含量较对照分别显著提高17.1%~46.7%和32.5%~76.3%。(3)磷肥水平≥45 kg/hm2时,配施生物炭处理的树脂磷和碳酸氢钠无机磷的含量较对照分别显著增加50.8%~160.3%和36.1%~118.3%。(4)减磷施肥导致氢氧化钠有机磷含量较对照下降38.4%~39.8%;处理间氢氧化钠无机磷的含量无显著差异。(5)配施生物炭后稀盐酸磷含量较对照显著提高57.9%~352.1%;减磷施肥处理的浓盐酸有机磷含量显著低于正常施磷... 相似文献
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长期不同施肥下南方黄泥田有效磷对磷盈亏的响应特征 总被引:8,自引:2,他引:6
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生物炭与氮肥配施对土壤肥力及红枣产量、品质的影响 总被引:15,自引:4,他引:11
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不同原料生物炭对氮、磷、钾的吸附和解吸特性 总被引:5,自引:2,他引:3
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生物炭用量对塿土微生物量及碳源代谢活性的影响 总被引:2,自引:0,他引:2
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潮土小麦和玉米Olsen-P农学阈值及其差异分析 总被引:5,自引:2,他引:5
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施用常规磷水平的80%可实现玉米高产、磷素高效利用和土壤磷平衡 总被引:5,自引:2,他引:5
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Zhongwang Jing Shiping Wei Xiangui Lin 《Communications in Soil Science and Plant Analysis》2017,48(20):2455-2463
With the depletion of global phosphorous (P) reserves, finding alternatives to P fertilizers has been gaining more and more attention. This study was conducted to identify whether biochar application could improve P availability in a P-deficient alkaline alluvial soil. Unground biochar contained a high level of 692 mg kg?1 extractable P, over 100 times more than that in the soil. Extractable P content increased significantly with the decrease of biochar particle size. There was a significant positive correlation between soil available P content and biochar application rates. The pot experiment showed that biochar application significantly increased the soil available P content before sowing, and significantly improved the aboveground biomass of soybean and promoted P uptake at harvest. Biochar, as containing abundant extractable P, could go partly on substituting mineral P fertilizers as well as promote plant growth and reduce P fertilizer application in agriculture. 相似文献
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秸秆生物炭输入对冻融期棕壤磷有效性的影响 总被引:6,自引:0,他引:6
冻融交替是东北地区土壤常见的温度变化现象。通过室内模拟冻融循环方法,分析秸秆生物炭输入对冻融期东北地区棕壤有效磷影响规律及机理,探讨生物炭还田对东北春季作物生长初期土壤养分供应状况的影响。结果表明:(1)除在0~5次冻融循环中冻融次数对有效磷含量无显著影响外,冻融循环次数、生物炭施加量以及二者交互作用对土壤有效磷含量在各冻融阶段(0~5次、5~30次、0~30次)均有极显著影响。(2)培养结束后施加生物炭量2%、4%和6%处理,有效磷含量随生物炭施入量增大而依次增加,且均明显高于对照处理20%以上。各处理在第5次冻融左右达到峰值,有效磷含量增加幅度随生物炭施加量增加而减小。在第20次冻融循环后各处理有效磷含量达到相对谷值,此时施加生物炭处理有效磷含量较未冻融时有明显降低。说明,生物炭在常温培养时可以增加土壤有效磷含量,但是,在冻融过程中,相对于对照处理可以较好固持土壤磷素,减小磷素随融雪过程流失的风险。(3)通过分析生物炭输入后棕壤pH、电导率、有机质和中性磷酸酶活性等生物化学性质对冻融循环过程响应,以及不同冻融循环阶段与土壤有效磷相关分析,发现有机质含量在冻融循环过程中变化显著且与有效磷含量具有显著相关性。生物炭通过增强团聚体稳定性,减少有机质释放来固持土壤磷素。 相似文献
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近年来,茶树种植过程中化肥的超量施用造成茶园土壤酸化加剧和有机质含量降低等一系列问题,进而影响到茶叶的产量和品质。生物质炭一般呈碱性,具有含碳量高、比表面积大、高度生物化学稳定性和较强的吸附性能等特性,能够增加土壤碳储量,提高土壤pH值和养分有效性,对于茶园土壤固碳、土壤改良和抑制土壤氮磷流失、改善农产品品质等方面有较大作用。针对我国茶园土壤存在的主要问题,以生物质炭的特性及生物质炭改良土壤的作用机理为研究对象,重点阐述了生物质炭在茶园酸化土壤改良、土壤氮素淋失阻控、土壤固碳增汇等方面的效应,以及生物质炭提高茶叶产量和提升茶叶品质方面的作用机理。基于以上研究,展望了生物质炭在茶园管理方面的理论研究方向,为生物质炭在农业生产中的应用和推广提供科学依据。 相似文献
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Yixuan CHEN Zhonghua WEN Jun MENG Zunqi LIU Jialong WEI Xiyu LIU Ziyi GE Wanning DAI Li LIN Wenfu CHEN 《土壤圈》2024,34(2):361-373
Phosphorus (P) is an essential element for plant growth but is often limiting in ecosystems; therefore, improving the P fertilizer use efficiency is important. Biochar and arbuscular mycorrhizal fungi (AMF) may enhance P cycling in paddy soils that contain high content of total P but low content of available P (AP). In this study, the effects of biochar addition and Rhizophagus irregularis inoculation on the organic and inorganic P contents and phosphatase activities in paddy soils, rice seedling growth, and AMF colonization were investigated. Compared with no biochar addition, biochar addition enhanced the percentage of spore germination at day 7, hyphal length, most probable number, and mycorrhizal colonization rate of R.irregularis by 32%, 662%, 70%, and 28% on average, respectively. Biochar and R. irregularis altered soil P cycling and availability. Biochar and R. irregularis, either individually or in combination, increased soil AP content by 2%-48%. Rice seedlings treated with biochar and R. irregularis produced greater biomass, improved root morphology, and increased nutrient uptake compared with those of the control without biochar and R. irregularis. The results suggest that combined application of biochar and R. irregularis is beneficial to rice cultivation in paddy soils with high content of total P but low content of AP. 相似文献
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《Communications in Soil Science and Plant Analysis》2012,43(21):2756-2766
ABSTRACTBiochar has not been adequately used by farmers to improve the clay textured soil productivities in the world. Therefore, the objective of this study is to investigate the effect of the co-application of biochar with different rates of phosphorus (P) fertilizer on selected soil physical properties and wheat yield on clay textured soil over two growth seasons. Biochar treatments occupied the main plots at a rate of 0.0 and 10 t ha?1, while the sub-plots were devoted to phosphorus rates at rates of 0%, 50%, 100%, and 150% of recommended P fertilizers. Biochar (10 t ha?1) and P at different rates decreased soil bulk density significantly. Meanwhile, it increased aggregate stability, saturated hydraulic conductivity and soil water retention significantly at (p < .05), and it improved the grain yield of wheat. More grain yields in the soil treated with biochar than untreated soil under all P application rates for both years were probably caused partially by more nutrients (N, P, and K) were applied from biochar itself. Grain yield of wheat in the soil-amended biochar and P did not increase significantly between the application at 50%, 100% and 150% P. The results of this study indicate that phosphorus blends with biochar can be used to decrease the bulk density of clay textured soils and to improve crop production in these soils. 相似文献
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[目的]证实生物质炭中的水溶性有机碳对作物生长和品质的作用,为生物质炭的应用开辟新的途径。[方法]在实验室制取400,450,500℃小麦秸秆生物质炭,以KOH溶液浸提水溶性有机碳获得生物质炭浸提液W_(400),W_(450),W_(500),并应用于盆栽大蒜试验,研究其对大蒜生长、品质及土壤的影响。[结果](1)W_(400),W_(450),W_(500)对大蒜的生长都没有显著影响;(2)W_(400)处理使大蒜可溶性糖的含量显著提高了27.53%,土壤有机质和速效磷含量分别提高37%,26%;(3)W_(450)处理下大蒜维生素C、大蒜素含量分别显著提高34.9%和8.2%。[结论]生物质炭浸提液对大蒜生长没有影响,但可以提高大蒜品质。 相似文献
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《Communications in Soil Science and Plant Analysis》2012,43(20):2610-2625
ABSTRACTConversion of manures to vermicompost and biochar may alleviate some negative effects of manure application to soil but the efficiency of the produced vermicompost and biochar as compared to their feedstocks is not well-known. In the current investigation, we compared the effects of sheep manure and its derived vermicompost and biochar (pyrolyzed at 400°C for 4 h) on the properties of a calcareous soil that planted with five cultivars of barley (Behrokh, Khatam, Reyhaneh03, Fajr 30 and Nimrooz) for 60 days. Different soil properties and availability of nutrients and barley yield were determined after plant harvest. The biochar significantly increased barley yield rather than control (4.20 vs. 3.57 g pot?1), but sheep manure and vermicompost had no effect on it (3.51 and 3.37 g pot?1, respectively). Fajr 30 and Nimrooz (3.52 and 3.42 g pot?1, respectively) had significantly lower yield than other cultivars. Biochar increased soil pH up to 8.2. Soil salinity was increased by application of all organic materials (increase to 16–36%). Cation exchange capacity (CEC) and organic matter content of soil were also increased by all organic materials application (0.4–0.9 cmol kg?1 and 0.33–0.50%, respectively). All organic materials increased total nitrogen (N), but this increase was the highest with sheep manure application (53%). The availability of phosphorus (P) and potassium (K) was increased significantly by application of all organic materials, and this increase was the highest with biochar application (19 and 309 mg kg?1, respectively). Biochar application had no effect on the availability of micronutrients, but application of sheep manure and vermicompost increased the availability of iron (Fe) (0.62 and 0.48 mg kg?1, respectively) and zinc (Zn) (0.18 and 0.37 mg kg?1, respectively). Generally, organic materials may change the status of soil nutrients via change in soil pH, organic matter content, release of nutrients, increase in soil CEC and formation of soluble complex with nutrients. 相似文献