不同生物炭用量对湘西植烟土壤养分的影响

发布时间：2018-04-20 20:47

本文选题：生物质炭 + 植烟土壤　；参考：《河南农业科学》2017年02期

【摘要】：通过大田试验,设置不施肥(T1),常规施肥(T2),减氮5%、10%、15%、20%常规施肥基础上施生物炭450(T3)、900(T4)、1 350(T5)、1 800(T6)kg/hm~26个处理,研究生物炭对土壤养分的影响,以确定最适合湘西烤烟的生物炭用量。结果表明,随着生物炭用量的增加,各生育时期土壤有机质含量总体均呈现增加的趋势,施用生物炭处理有机质含量均大于不施肥和常规施肥处理,总体以移栽后60 d时较大,此时T6处理有机质含量最高,达37.83 g/kg,比不施肥处理增加24.72%,比常规施肥处理增加22.11%;与不施肥和常规施肥处理相比,施用生物炭可增加土壤碱解氮、速效磷和速效钾含量,且其随着生物炭用量增加先增加后降低,总体上,土壤碱解氮、速效磷含量均以T4、T3处理较高,速效钾含量以T5处理效果最佳,T4处理次之;施用生物炭可以增加土壤pH值和C/N,且其均随生物炭用量增加而增加,施用生物炭处理土壤pH值平均各生育时期分别比不施肥和常规施肥处理增加7.65%~13.75%和5.28%~11.25%。综合分析,施用生物炭可提高土壤养分含量,以T4处理效果最好,适宜在产区进行示范应用。
[Abstract]:In the field experiment, no fertilizer application, conventional fertilizer application, nitrogen reduction were applied on the basis of 1010151520% conventional fertilization, and the biological carbon 450U T3D900 T4N 1350T5N 1 800 T6kg / hmm26 treatments were applied to study the effect of biochar on soil nutrients, and to determine the best biochar application rate for tobacco flue-cured tobacco in the west of Xiangxi. The effect of biochar on soil nutrient was studied. The effect of biochar on soil nutrient was studied in order to determine the most suitable amount of biochar for tobacco flue-cured tobacco in Xiangxi. The effect of biochar on soil nutrient was studied. The results showed that with the increase of biochar amount, the content of soil organic matter in each growing period showed an increasing trend, and the organic matter content of biocharcoal treatment was higher than that of no fertilization and conventional fertilization treatment, and the total content of organic matter was larger at 60 days after transplanting. The content of organic matter in T6 treatment was the highest (37.83 g / kg), which was 24.72% higher than that in no fertilization treatment and 22.11% higher than that in conventional fertilization treatment. Compared with non-fertilization treatment and conventional fertilization treatment, the content of soil alkali-hydrolyzed nitrogen, rapidly available phosphorus and rapidly available potassium were increased by applying biochar. With the increase of the amount of biochar, the content of soil alkali-hydrolyzed nitrogen and available phosphorus was higher than that of T4T _ 3 treatment, and the best available potassium content was T5 treatment and T4 treatment. Application of biochar could increase soil pH value and C / N value, and both of them increased with the increase of biochar application rate. The average soil pH value of biochar treatment increased by 7.65% and 5.28% 11.25%, respectively, compared with that of non-fertilization and conventional fertilization treatments. Comprehensive analysis showed that the application of biochar could increase soil nutrient content, and T4 treatment was the best, which was suitable for demonstration application in productive areas.
【作者单位】：河南农业大学烟草学院;广东中烟工业有限责任公司;
【基金】：广东中烟工业有限责任公司基金项目[粤烟工15XM-QK(2013)-01]
【分类号】：S158;S572

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