海滨锦葵干物质积累和养分吸收规律的研究

Dry matter accumulation and nutrient absorption in seashore mallow plant

研究了海滨中度盐土条件下海滨锦葵的干物质积累、养分吸收与产量的关系。结果表明,海滨锦葵各生育期的干物质积累量大小依次为灌浆期〉成熟期〉开花期〉现蕾期〉苗期。氮磷钾的吸收量在整个生育期遵循＂慢-快-慢＂的规律,吸收速率呈现先升后降的趋势,最高峰出现在灌浆期。整个生育期海滨锦葵对氮、磷的吸收量是果〉叶〉茎,对钾的吸收量是果〉茎〉叶。在海滨盐土中等盐分土壤（0.4%~0.5%）上种植海滨锦葵,每生产100kg籽粒需氮8.5kg、磷1.0kg、钾5.3kg,氮磷钾吸肥比例为1∶0.1∶0.6。

Seashore mallow is often grown on saline soil with medium to high salinity levels.The dry matter accumulation and nutrient uptake of seashore mallow grown on medium saline soil was studied.The dry matter accumulation of seashore mallow at different growth stages followed the descending order of grain filling stage,ripening stage,flowering stage,budding stage and seedling stage.The absorption of nitrogen,phosphorus and potassium in the stems,leaves and fruits of seashore mallow plant was in conformity with a ＂slow-fast-slow＂ model.The nutrient absorption peak appeared at grain filling stage.When seashore mallow is grown on saline soil with medium salinity level（0.4%～0.5%）,8.5kg nitrogen,1.0kg phosphorus and 5.3kg potassium are needed to produce 100kg grain.The absorption ratio of nitrogen,phosphorus and potassium is 1∶0.1∶ 0.6.