酉阳县不同前茬作物的植烟土壤肥力评价

Evaluation about soil fertility of tobacco planting of different preceding crop in Youyang county

对酉阳县苍岭基地单元不同前茬作物的植烟土壤肥力特征进行了研究。结果表明,①前茬作物为玉米的植烟土壤:88.24%的土壤样品pH适宜于烟株的生长,土壤碱解氮含量位于适宜范围内的土样所占比例为11.76%,29.41%的土壤样品速效磷含量位于烟株生长的适宜范围,58.82%的土壤样品速效钾含量低于150 mg/kg,有机质含量的平均值为14.97 g/kg,土壤中氯离子含量为10~30 mg/kg的土壤样品所占比例为58.82%。②前茬作物为蔬菜的植烟土壤:土壤pH都适宜于烟株生长,碱解氮含量都不适宜于烟株生长,33.33%的土壤样品速效磷含量位于适宜范围,土壤中速效钾含量低于150 mg/kg的土壤样品所占比例为50%,土壤有机质含量的平均值为16.91 g/kg,66.67%的土壤样品氯离子含量位于烟株生长的合适范围内。③前茬作物为烟草的植烟土壤:20.78%的土壤样品pH不适宜于烟株生长,仅有5.2%的土壤样品碱解氮位于适宜范围内,62.34%的土壤样品速效磷含量不适宜于烟株生长,53.25%的土壤样品速效钾含量在适宜于烟株生长的范围内,有机质平均值为15.53 g/kg,氯离子含量为10~30 mg/kg的土壤样品所占比例为68.83%。④针对土壤养分含量状况提出了一些相应的应对措施。

The soil fertility characteristics of different preceding crops in the Cangling base of Youyang county were studied.The results showed that: ①Tobacco soil with corn as the previous crop: 88.24% of the soil pH were suitable for the growth of tobacco plants, 11.76% of the soil samples were located in the suitable range about soil alkali hydrolyzable nitrogen, 29.41%of the soil available phosphorus was located in the suitable range of tobacco growth, and 58.82% of the soil sample available potassium content was lower than 150 mg/kg, and the average content of organic matter was on average of 14.97 g/kg, and the soil samples with chloride content ranging from 10 to 30 mg/kg account for 58.82% of the total. ②Tobacco soil with vegetables as the previous crop: The soil pH was suitable for the growth of tobacco plants. The content of alkali hydrolysable nitrogen was not suitable for the growth of tobacco plants. The content of available phosphorus in 33.33% soils was located in the suitable range. The content of available potassium in soil less than 150 mg/kg accounted for 50%, the average value of soil organic matter content is 16.91 g/kg, and the content of chlorine ion of 66.67% soil samples located in the soil was in the suitable range of the growth of the tobacco plant. ③The soil with tobacco as the previous crop: 20.78% soil pH was not suitable for the growth of tobacco plants, only 5.2% soil alkali hydrolyzable nitrogen was within the suitable range, 62.34%of the soil available phosphorus content was not suitable for the growth of tobacco plants. 53.25% of the soil available potassium content was suitable for the growth range of tobacco plants, the average organic matter average is 15.53 g/kg, soil samples with chloride ion content of 10~30 mg/kg accounted for 68.83%. ④Some corresponding countermeasures were put forward according to the soil nutrient content.