杭州市不同农业地貌区耕地土壤肥力的差异及施肥对策  

Differences in Soil Fertility of Cultivated Land in Different Landforms of Hangzhou Region and Its Fertilization Countermeasures

作　　者：吴崇书 倪中应 刘永红[2] 谢国雄[3] 章林英 季淑枫[3] 

机构地区：[1]淳安县植保土肥站,浙江淳安311700 [2]桐庐县农技推广中心,浙江桐庐311500 [3]杭州市植保土肥总站,杭州310020

出　　处：《农学学报》2015年第6期59-64,共6页Journal of Agriculture

基　　金：农业部测土配方施肥项目(浙农计发{2008}16号)

摘　　要：为了解杭州市耕地土壤肥力的空间差异,指导科学施肥,比较分析了杭州市滨海平原、水网平原、河谷平原和丘陵山地等4个农业地貌区间耕地土壤p H、有机质、全氮、有效磷、速效钾和CEC等主要肥力指标状况。结果表明,杭州市耕地土壤酸化以丘陵山地和河谷平原区最为明显;滨海平原区耕地土壤有机质、全氮及保肥能力明显低于其他地区;除水网平原区外,其他地区速效钾普遍偏低;因施肥水平的差异各农业地貌内土壤有效磷都有较大的变化。总体上,耕地土壤肥力水平以水网平原区为最高。文中提出了各农业地貌区的施肥对策:在滨海平原应重视基础地力的提升,增加有机肥料的投入;水网平原区内应重视测土施肥工作,根据土壤养分实际状况针对性地施用肥料;丘陵山地和河谷平原区,需重视石灰的施用,对土壤酸度进行核正,适当增加钾肥的用量。In order to understand the spatial variation in soil fertility of cultivated land in Hangzhou and guide the scientific fertilizing, the author analyzed the differences in pH value, organic matter, total N, available P, available K and CEC of 4 agricultural landforms, including plain with water network, coastal plain, valley plain and hilly areas. The results showed that cultivated land acidification in valley plain and hilly areas were obvious in Hangzhou. The contents of organic matter and total nitrogen and fertilizer retention capacity （CEC） in coastal plain were lower than those of other areas significantly. Except the plain with water network, soil available K of cultivated land was generally low. Soil available P of those four agricultural landform areas varied greatly because of the difference in fertilization. On the whole, fertility of cultivated soil in water net plain was the highest in this region. Some fertilization countermeasures for each of those agricultural landform areas were put forward. It was important to increase input of organic fertilizers and improve basic fertility of the cultivated land in the coastal plain. Soil testing and fertilization was an important work in the plain with water＆amp;nbsp;network, and application rate of fertilizers should be determined according to actual status of soil nutr ients. Using limestone to decrease soil acidity and appropriately increase the dosage of potassium fertilizer should be suitable ways to modify soil quality of the cultivated land in valley plain and hilly areas.

关 键 词：杭州市 耕地土壤 农业地貌 肥力变化 

分 类 号：S158[农业科学—土壤学]