广西和福建两省荔枝园土壤养分吸附特性

应用土壤养分状况系统研究法(ASI)对广西和福建两省荔枝主产区荔枝园土壤的养分吸附能力进行系统研究。结果显示:(1)广西贵港市土壤对P的吸附率平均为44.3%,K为43.6%,B为19.5%,Zn为18.7%,S为2.1%;玉林市P为50.0%,K为33.2%,B为32.1%,Zn为20.5%,S为6.1%;钦州市P为51.4%,K为22.2%,B为17.7%,Zn为22.5%,S为36.2%。可见,贵港市和玉林市土壤对养分的吸附能力大小均为P>K>B>Zn>S,而钦州市为P>S>Zn>K>B。(2)广西荔枝园土壤对P的吸附率平均为49.5%,K为30.2%,S为18.9%,B为22.6%,Zn为21.1%;而福建P为30.4%,K为23.4%,B为18.5%,S为15.6%,Zn为21.0%。可见,两省荔枝园土壤对磷的吸附均很强(两省荔枝园土壤均属铁铝土,而铁铝氧化物含量丰富),而对钾、硼、锌和硫的吸附能力均相对较弱。广西荔枝园土壤对P、K、S和B的吸附能力显著强于福建(由南向北,铁铝土的富铝化风化程度减弱),而对Zn的吸附能力相当。

Evaluation on Characteristic of Absorbing of Litchi Plantation Soil Nutrient in Guangxi and Fujian Province

The ASI method is a good method in evaluating the nutrient supplying properties in soils,and the ASI method was employed in litchi plantation soils.The results show:(1) In litchi plantation located in Guigang,Guangxi,the average absorption rate of P to the soil was 44.3%,K was 43.6%,S was 2.1%,B was 19.5%,Zn was 18.7%.In Yulin,Guangxi,the average absorption rate of P to the soil was 50.0%,K was 33.2%,S was 6.1%,B was 32.1%,Zn was 20.5%.And in Qinzhou,Guangxi,the average absorption rate of P to the soil was 51.4%,K was 22.2%,S was 36.2%,B was 17.7%,Zn was 22.5%.Therefore,it is clear that the soil located in Guigang and Yulin its absorption abilities of nutrients are catering to P>K>B>Zn>S,but in the order P>S>Zn>K>B located in Qinzhou.(2) In Guangxi province,the average absorption rate of P to the soil was 49.5%,K was 30.2%,S was 18.9%,B was 22.6%,Zn was 21.1%;but In Fujian province,P was 30.4%,K was 23.4%,B was 18.5%,S was 15.6%,Zn was 21.0%.It is clear that the soils of the two provinces both have high absorptions capacities to P(For the soils of the two provinces both belong to ferralsol,which has high content of iron and aluminum oxide),but have low in K,B,Zn and S.And the absorption abilities to P,K,S and B of the litchi soil in Guangxi are definitely stronger than Fujian’s,while the ability to Zn in the two provinces is about the same.That’s because the degree of rich aluminum and weathering of the ferralsol abate accordingly of from south to north.