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以“养分指数”为依据对新栽麻和成龄麻苗期、封行期进行植株养分平衡营养诊断 ,结果表明 ,各时期养分元素障碍因子对产量与品质的限制程度依次为 :(1 )苗期 :新栽麻B >Fe >Cu>S ,成龄麻N >B >P >Fe>Cu >S ;(2 )封行期 :基础肥力较好的土壤上新栽麻Mg ,B >Zn >K >Ca ,成龄麻 :Mg ,B >Zn >N ,P >K >Ca;基础肥力较差的土壤上新栽麻与成龄麻 :Mg ,B >Zn >N ,P >K >Ca >Fe。经相关分析及产量、品质双频寻优提出了苎麻高产优质平衡施肥优化方案 ,其实施结果 :新栽麻增产 9.5 1 % ,增支 7.86 % ;成龄麻增产 2 1 .5 % ,增支 2 0 .6 %。
Based on “Nutrient Index”, the nutrition diagnosis of plant nutrition balance was carried out at the seedling stage and the seal stage of newly planted nursery and mature nursery. The results showed that the limiting factors of yield and quality of nutrient element obstacle in each period were as follows: (1) Seedling stage: newly planted Ma B> Fe> Cu> S, mature maize N> B> P> Fe> Cu> S; (2) Zn> K> Ca, age, Mg, B> Zn> N, P> K> Ca. > Ca> Fe. Based on the correlation analysis and double-frequency optimization of yield and quality, the optimized plan of high-yield and high-quality balanced fertilization for ramie was put forward. The results showed that the yield of newly planted ramie was 9.51% and the increase was 7.86% 20.6%.