摘要
有机肥施用对土壤根际生态区域的影响关系密切,为探讨混合有机肥(草炭、芝麻饼肥、腐植酸、矿质肥)作用下烤烟根际的动态变化,采用盆栽试验,研究了混合有机肥用量对烤烟根系活力、土壤酶活性及微生物量碳(SMBC)的影响。结果表明:(1)增施混合有机肥500 g/株对烤烟根系活力提高效应最大,于移栽后60 d较对照提高了200.06%。(2)增施混合有机肥500 g/株对土壤脲酶、蔗糖酶、过氧化氢酶的提高作用最显著,于移栽后60 d土壤酶活性较对照依次提高了53.45%、33.98%、61.90%,而增施混合有机肥750 g/株对土壤微生物量碳的提高作用最明显,其次为500 g/株的处理,在移栽后60 d分别较对照提高了97.51%和82.04%。(3)混合有机肥作用下,各处理的烤烟根系活力、土壤脲酶、蔗糖酶及微生物量碳均有显著提高,均在移栽后60 d出现峰值。总之,施用适量混合有机肥能提高烤烟根系活力,改善根际土壤环境,以500 g/株的处理最佳。
The application of organic fertilizer has a great impact on the soil rhizosphere ecological area. In order to study the effects of a mixed organic fertilizer (peat, sesame cake, humic acid and mineral fertilizer) on the flue-cured tobacco rhizosphere, a potted plant experiment was conduced to investigate the effects of application rates of the mixed organic fertilizer on root vigor of flue-cured tobacco, soil enzyme activities and soil microbial biomass. The results showed that: (1) Application of the mixed organic fertilizer at the rate of 500 g per plant showed the greatest improvement of flue-cured tobacco root vigor, and it enhanced the root vigor of flue-cured tobacco by up to 200.06% 60 days after transplanting. (2) The activities of soil urease, invertase and catalase were increased most significantly at the application rate of 500 g per plant, and 60 days after transplanting the enzyme activities were increased by 53.45%, 33.98% and 61.90%, respectively. Application of the mixed organic fertilizer at 750 g per plant had the most obvious effect on soil microbial biomass carbon, followed by the application rate of 500 g per plant. At the time of 60 days after transplanting these two application rates improved the contents of soil microbial biomass carbon by 97.51% and 82.04% respectively. (3) The flue-cured tobacco root vigor, soil enzyme activities and soil microbial biomass carbon all showed a peak 60 d after transplanting for all the treatments, suggesting that application of the mixed organic fertilizer can significantly enhance root vigor, soil enzyme activities and soil microbial biomass carbon, and that the appropriate application rate is 500 g/plant for the purpose of improving rhizosphere soils of flue-cured tobacco.
出处
《中国烟草科学》
CSCD
北大核心
2016年第1期32-36,44,共6页
Chinese Tobacco Science
基金
国家烟草专卖局特色优质烟叶开发重大专项[110201101001(TS-01)]
关键词
混合有机肥
根系活力
根际土
酶活性
微生物量碳
烤烟
mixed organic fertilizer
root vigor
rhizosphere soil
enzyme activity
microbial biomass C
flue-cured tobacco
