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磷肥在主要类型土壤中的有效性与形态转化.pptx

发布:2020-02-23约1.57千字共21页下载文档
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磷肥在主要类型土壤中的有效性与形态转化;Part 01 / 研究背景 Part 02 / 研究进展 Part 03 / 计划安排 ;China:7% of arable land, 35% of world P consumption;;Fig. 2. Illustration of different mechanisms involved in the solubilization and mineralization of insoluble P by P activators in soils. (A) Enlarged drawing of root; (B) Metal ions and metal oxides which easily form P-O-M compounds in soil. (a) Effect of soil pH on sparingly soluble Pi (inorganic phosphorus)minerals; (b) formation of complexes with (B) to release phosphate; (c) competition for sorption sites with phosphate in soil; (d) adsorption of metal and metal oxides to release phosphate; (e) sheltering sorption sites in soil; (f) hydrolysis of Po (organic phosphorus) and Pi; (g) strengthening of phosphatase enzyme activity; (h) promotion of root growth; (i) biochar increasing mycorrhizal-plant associations; (j) exchange-induced dissolution; (k) production of organic acids by microbial processes; (m) Po Pi retention and release. ABT rooting powder: have the ability to promote rooting and to increase the survival rate of plants under abiotic stress.;施入的磷肥10.4%-11.4%被玉米地上部吸收; 施入的磷肥74.1%-84.1%在土壤中; 施入的磷肥0.8%-4.5%在 微生物中;红壤中肥料主要向NaOH-Pi和Residual-Pi分配 黑土中肥料磷向NaOH-Pi和HCl-Pi中分配较多 潮土中肥料磷则主要向HCl-Pi中分配 土壤各磷库中肥料向Resin-Pi中分配最少;根际过程几乎活化了土壤中所有中活性磷和难溶性磷,红壤中主要活化了NaOH-Pi和Residual-Pi;黑土中主要活化了Residual-Pi;主要活化了潮土中HCl-Pi。 土壤微生物活化了土壤中Residual-Pi以及潮土中的HCl-Pi。;难溶性磷 (mg kg-1);1986;小结;DGT预测作物产量对磷的响应;DGT预测作物有效磷;(Laetitia Six et.al, 2014);Fluvo-aquic soil;初步试验结果——DGT与Olsen法对地上部生物量的预测;潮土;潮土;不同形态磷肥化学性质及生物有效性; Pot experiment;Thank you for your attention
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