【摘要】 采用三种覆盖模式(二元覆盖模式、垄覆沟种模式、膜侧种植模式),研究了隰县试区旱塬地玉米同化产物积累及氮、磷、钾吸收、分配等问题。结果表明,以二元覆盖种植方式最好,其亩产量为602kg,比对照增产10.14%;同化产物(干物质)积累至9月2日总增重353.17g/株,比对照高39.5%;8月上旬叶面积最大,比对照高7.9%;灌浆期比对照提早7～8天,持续时间长7～8天;每一亩 N、P、K 吸收量分别为19.3kg、2.0kg、9.8kg。同时对叶面积增长与干物质和地上部与地下部消长相关性进行了探讨。更多还原

【Abstract】 The rules of assimilate accumulation and N.P.K nutrient absorption and distribution in maize plant on dry land were studied in Xixian area under 3 mulched conditions(ridgemulched, T.M.M.and filmmulched).The result showed that the effect of T.M.M.was best.Under the T.M.M.condition the maize yield was 602kg/mu,10.14% higher than CK;assimilate accumu- lation was 353.17g/plant until September 2;leaf area reached the maximum peak and was 7.9% higher than CK in August 10;time of filling was 7—8 days earlier than CK and the duration of filling period was 7—8 days longer than CK;N.P.K.absorption was 19.3kg/mu,2.0kg/mu and 9.8kg/mu respectively.The relationship between leaf area incresing and dried substance in- creasing was studied also.更多还原