广西横县茉莉花连作田土壤改良与产量关系研究

Study on Soil Improvement and Relationship with Output of Jasminum sambac Succession Cropping in Heng County,Guangxi

为探索广西茉莉花主产区横县连作田土壤理化性状及茉莉花产量影响因素,形成土壤改良有效方案,为茉莉花低产田改造提供技术支持。对横县连作10年以上茉莉花田的土壤理化性状进行调查,筛选土壤改良方案并分析土壤理化性状与产量的相关性。结果表明,所调查土壤p H值最高4.87,最低3.82,土壤容重1.45~1.48 g/cm3,土壤有机质、速效氮含量较低,而速效磷及速效钾含量较高。百花重与p H值、电导率呈极显著正相关;p H值与电导率呈显著负相关;电导率与速效钾呈极显著正相关;土壤容重与毛管含水率呈显著负相关;土壤容重与速效磷呈极显著负相关。综合产量及土壤改良效果,最佳改良方案为A1B2C2,较改良前,土壤p H值提高了0.31个单位,饱和含水率和总孔隙度分别提高5.46和4.50个百分点,有机质提高3.00 g/kg,容重降低0.11 g/cm3,百花重达33.50 g。

To investigate the soil properties and the influence factors of yield of jasmine in the continuous cropping field in Heng County and find out an effective soil improvement to provide the technical support for low yield farmland, investigation of the soil physical and chemical properties which was continuous cropping of jasmine more than 10 years to selected soil improvement program and analyzed the correlativity between the soil properties and the jasmine yield. The results showed that the pH of the investigated soil was from 3.82 to 4.87, and the soil bulk density was from 1.48 to 1.45 g/cm3 , soil organic matter and available nitrogen content were low, and rapidly available phosphorus and rapidly available potassium were high. The weight of one hundred flowers had a significantly positive correlation with pH and electrical conductivity. There was a negative correlation between pH and electrical conductivity. Electrical conductivity had a significantly positive correlation with rapidly available potassium. Soil bulk density had a significant negative correlation with capillary moisture content, and had a highly significant negative correlation with rapidly available phosphorus. Combining the output and the improved effect on soil, the best program was A1 B2C2,which could increased 0.31 units in the soil pH and 3.00 g/kg in organic matter, and raised of 5.46 percent in the saturated water content and 4.50 percent in the total soil porosity, with decrease of 0.11 g,/cm3 in the bulk densities, the weight of one hundred flowers reached to 33.50 g.