笋用林土壤养分限制因子的研究

A Study on the Limiting Nutrient Factors in Shoot-utilizing Bamboo Soil

采用土壤养分状况系统研究法 ,通过对奉新和铜鼓两地笋用林土壤的理化分析 ,吸附试验及温室盆栽试验 ,进行了 1 2种养分的系统研究 ,分析了土壤养分含量特点 ,初步研究了养分限制因子。研究结果表明 :奉新笋用林土壤养分限制因子及亏缺顺序为P ,N ,K ,S ,Mg ;盆栽不施P ,N ,K ,S,Mg分别减产 65.6% ,4 7.7% ,1 8.4 % ,1 5.3 % ,1 5.1 %。铜鼓笋用林土壤养分限制因子及亏缺顺序为Ca,P ,Mg,N ;盆栽不施Ca,P ,Mg,N分别减产 88.3 % ,81 .2 % ,4 2 .9% ,3 0 %。

The method of systematic study on soil nutrition is employed in this paper. By physical and chemical analysis, sorption test and greenhouse pot experiment on the soil under shoot-utilizing bamboo in Tonggu and Fengxin Counties, a systematic study was conducted on 12 nutrients so as to analyze the characteristics of the content of soil nutrition, and confirm preliminarily the limiting factors of soil nutrition. The results showed: the order of lack and limiting factors in the soil from Fengxin was P, N, K, S, Mg and the yields would be reduced by 65.6%, 47.7%, 18.4%, 15.3% and 15.1% respectively if P, N, K, S, Mg were not applied into the soil; The order of lack and limiting factors in the soil from Tonggu was Ca, p, Mg, N and the yields would be reduced by 88.3%, 81.2%, 42.9% and 30% respectively without application of these elements.