湘西与湘中耕地的土壤养分限制因子差异分析

• 作 者: 尹力初 罗兰芳 彭宇 周曙光 罗建新
• 机 构: 湖南农业大学资源环境学院,湖南中烟工业有限责任公司技术中心,
• 出 处: 土壤通报
• 发表日期: 2011年06期
• 关键词: 养分限制因子 耕地土壤 限制因子 系统研究法 高粱 湘中 盆栽试验 土壤养分 养分 土壤养分状况

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,对湘西与湘中耕地土壤的养分限制因子进行了系统诊断。结果表明:湘中耕地土壤的养分限制因子仅为N,生物盆栽试验中缺N使高粱生物量减少81%;而湘西耕地土壤的养分限制因子相对较多,其中N是第1养分限制因子,P是第2养分限制因子,S是第3养分限制因子,缺N、缺P、缺S分别使高粱生物量平均减少85%、45%、32%。

The soil nutrient test, adsorption test and WmP biological pot experiment were used to diagnose the nutrient limitation factors in the soils of western Hunan and Hunan provinces using sorghum as the indicator crop. The results showed that the limit nutrient of soils in the middle part of Hunan Province was only N, and the lack of N in the biological pot experiment reduced the biomass of sorghum by 81%. However, there were relatively more nutrients limiting factors in the cultivated soils in western Hunan, where N was the first nutrient limiting factor, P is the second nutrient limit factor, S is the third nutrient limit factor, lack of N, lack of P, lack of S, respectively, to reduce sorghum biomass by an average of 85%, 45%, 32%.