摘要
[目的]研究雷竹林地土壤养分限制因子,提出最佳施肥方案,指导雷竹林平衡施肥.[方法]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,对江西万年丰盛公司雷竹林土壤养分养分限制因子进行系统诊断.[结果]土壤对P和Cu具有较强的吸附固定能力,而对K、Zn和S的吸附固定能力较弱;盆栽试验中雷竹林土壤养分亏缺程度从大到小依次为Ca、P、Zn、N、S、Cu;雷竹林土壤中有效Fe、S和B含量普遍丰富,生物盆栽试验中3种供试土壤缺Ca、P、Zn,分别使高粱减产65.4个百分点、34.6个百分点、18.8个百分点.[结论]万年县雷竹林地土壤养分限制因子为Ca、P、Zn,亏缺程度从高到低依次为Ca、P、Zn,而N、B、Cu、S可能为潜在限制因子.
Abstract
[Objective] To research the limiting factors of soil nutrient in Phyllostacys praecox f.Prevelnalis plantation,to put forward the optimal fertilizer application scheme,and to guide the balanced fertilization of P.praecox plantation.[Method] Soil nutrient test,adsorption test and greenhouse/screenhouse technique biological pot experiment were all used together as the diagnostic program.With sorghum as the indicator crop,the limiting factors of soil nutrient in P.praecox plantation were systematically diagnosed.[Result] Soil had relatively strong fixed adsorption capacity to P and Cu,but relatively weak fixed adsorption capacity to K,Zn and S.In the pot experiment,the order of nutrient deficiency of P.praecox plantation was in the order of Ca ＞ P ＞ Zn ＞ N ＞ S ＞ Cu.Effective Fe,S and B contents were generally abundant in the soil of P.praecox plantation.And in pot experiment,three kinds of tested soils were lack of Ca,P and Zn,so that the dry matter yields of sorghum reduced by 65.4 percentage points,34.6 percentage points and 18.8 percentage points,respectively.[Conclusion] Ca,P and Zn are the limiting factors of soil nutrient in P.praecox plantation,their deficiency degrees are in the order of Ca ＞ P ＞ Zn.And N,B,Cu and S might be the potential limiting factors.
基金项目
国家科技支撑计划项目(2012BAC11B00)
国际植物营养研究所(IPNI)项目(Jiangxi-29)
国家科技期刊平台
NSTL
维普
万方数据