| 【Objective】Reasonable carbon amendment measures are the best way to improve soil organic carbon content and soil fertility of oasis farmland. Different carbon amendment applied with chemical fertilizers respectively were setup under drip irrigation system in Xinjiang province. In order to offer reference for the improvement of soil organic and soil fertility under drip irrigation, the influence of maize growth, nutrient absorption and soil fertility under different carbon amendment measures were investigated. 【Method】The experiment was carry out under same nitrogen conditions, Eight treatments were set up for the two-year located experiment, which included CK, chemical fertilizer(100% NP), corn stalk(CS), organic matter(OF), organic-inorganic compound fertilizer(OICF), and corn stalk applying with organic matter and organic-inorganic compound fertilizer, respectively. The effects of soil organic carbon, soil microbial fertility, soil physical and chemical fertility, biomass matter, chemical fertilizers use efficiency were studied under different carbon amendment measures in two-year located experiment. 【Result】(1) Compared with chemical fertilizer, different carbon amendment measures increased the contents of soil total organic carbon by 0.44~2.19 g/kg(2013) and 0.07~2.08 g/kg(2014), particulate organic carbon by 0.07~0.82 g/kg(2013) and 0.26~2.00 g/kg(2014), and also its availability(2) Different carbon amendment measures improved soil microbial biomass carbon(MBC) and nitrogen(MBN), MBC increased by 23.6~118.5mg/kg(2013) and 33.0~184.6 mg/kg(2014), MBN by 3.1~27.6 mg/kg(2013) and 4.0~37.8 mg/kg(2014). Enhanced basal soil respiration and respiratory quotient, decreased MBC to MBN.(3) Different carbon amendment measures reduced soil bulk density 0.01~0.07 g/cm3(2013) and 0.03~0.15 g/cm3(2014); raised soil field capacity and large soil aggregates number.(4) Different carbon amendment measures decreased soil p H, increased soil total nitrogen, available phosphorus and cation exchange capacity, by 0.01~0.08 g/kg(2013), 0.91~3.15 mg/kg(2013) and 7.05~17.5 cmol/kg(2013), 0.01~0.08 g/kg(2014),0.07~8.29 mg/kg(2014) and 9.76~27.7 cmol/kg(2014), respectively.(5) Different carbon amendment measures promoted maize growth, improved dry matter by 2 600~5 000 kg/ha(2013) and 2 800~6 400 kg/ha(2014), yield by 170~820 kg/ha(2013) and 70~2 980 kg/ha(2014), respectively. Different carbon amendment measures promoted the absorption of nitrogen and phosphorus, chemical nitrogen and phosphorus fertilizer use efficiency, agronomy efficiency and partial factor productivity and harvest index 【Conclusion】(1) Different carbon amendment measures increased the contents of soil total organic carbon and particulate organic carbon, and its availability, too. Enhanced basal soil respiration and respiratory quotient, improved soil microbial biomass carbon and nitrogen, decreased MBC to MBN.(2) Different carbon amendment measures reduced soil bulk density, raised soil porosity and field capacity, decreased soil p H, increased soil total nitrogen, available phosphorus and cation exchange capacity.(3) Different carbon amendment measures improved maize growth and the absorption of nitrogen and phosphorus, improved dry matter, yield and harvest index, also increased chemical fertilizer use efficiency.(4) Organic fertilizer applied with chemical fertilizer improved soil organic matter, soil physical and chemical fertility, microbial fertility better than organic-inorganic compound fertilizer applied with chemical fertilizer, better than corn stalk applied with chemical fertilizer. Applied 6 000 kg/ha organic fertilizer and 6 000 kg/ha corn stalk with chemical fertilizer had the best effect. |
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