摘要
采用DRIS法把生态—茶树—土壤作为有机整体对茶因进行多因素的营养诊断.结果表明,四川茶区可分为五个地理生态区,各区均最需氮素肥,其次是磷或钾肥.应用茶树养分指数诊断结果和茶叶产量与土壤速效养分含量的关系式,建立了茶园综合诊断施肥的数学模式,并进行生态分类、综合营养诊断、施肥方案的制订与选择和施肥效益预测,建立了茶园综合诊断施肥技术的专家咨询系统.
Using the DRIS method,integrated diagnosis was made of the nutritional status of thetea bushes On different plantations in Siehuan,in which the geographical ecological envi-ronments and the biological characteristics of the tea plants and the chemical properties ofthe soils were taken into consideration.Based on the results obtained,five geographicalecological regions were identified in the tea-producing areas of the province.They all re-quire the addition of nitrogen fertilizers and,to a lesser extent,phosphorous and/orpotassium fertilizers for a good harvest.A mathematical model(?)for integrated diagnosis of tea plantations was proposed:M=NR×T×CF^(-1)-0.8 S·D,where M represents the ferti-lizers to be supplemented,NR the nutritional requirement per unit yield of the tea bushes(kg),T the anticipated yield(kg),S available nutrients in the soil,D the coverage of the teaplantation,and CF a variable that may be fertilizer utilization rate,or 1-utilization rate,or 1,depending on the circumstances.Using computer technology,an expert system was es-tablished for offering advice on fertilization application strategies and integrated diagnosis.
出处
《西南农业大学学报（自然科学版）》
CSCD
1991年第4期459-464,共6页
Journal of Southwest Agricultural University
关键词
茶园
施肥
综合诊断
咨询系统
tea plantation
fertilizing
/integrated diagnosis related expert system
