张家界旱地土壤的养分限制因子研究
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国家烟草专卖局面上项目及湖南中烟公司项目(2008YC0003)资助


Study on soil nutrient limiting factors of dry cropland in Zhangjiajie City, Hunan Province
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    摘要:

    采用土壤养分测试、吸附试验和温网室生物盆栽试验相结合的诊断程序,以高粱为指示作物,对张家界市桑植县3种旱地土壤的养分限制因子进行了系统诊断。结果表明:张家界市旱地土壤中有效Ca、Fe、Mn 和B含量普遍丰富,且对P素养分的吸附能力强;生物盆栽试验中3种供试土壤上缺N、缺P、缺S分别使高粱生物量平均减少79%、41%、33%。由此,N、P、S分别是张家界旱地土壤中普遍存在的第一、二、三养分限制因子。

    Abstract:

    The limiting factors of soil nutrients were identified by systematic application of indicator plant (grain sorghum) and diagnostic soil analyses (soil adsorption trial and pot experiment) in three different dry croplands in Sangzhi County, Zhangjiajie City, Hunan Province. The results showed that the available Ca, Fe, Mn and B were sufficient in the soils, which having higher adsorption capacity for P than other nutrients. Compared with that of OPT treatment, biomass of grain sorghum plant grown under N-, P-, and S-lacked treatments decreased averagely by 79%, 41% and 33% respectively, it suggested N, P and S are the first, second and third nutrient limiting factors, respectively.

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尹力初,罗兰芳,彭 宇,周曙光,罗建新.张家界旱地土壤的养分限制因子研究[J].土壤,2011,43(4):525-528. YIN Li-chu, LUO Lan-fang, PENG Yu, ZHOU Shu-guang, LUO Jian-xin. Study on soil nutrient limiting factors of dry cropland in Zhangjiajie City, Hunan Province[J]. Soils,2011,43(4):525-528

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