土壤水分对鱼腥草生长和营养成分含量的影响

Effect of Soil Moisture on Growth and Nutrient Composition of Houttuynia cordata Thunb

采用盆栽试验,通过人工控制土壤水分的方法,研究了土壤水分含量对鱼腥草萌发、生长、产量和营养成分含量的影响。结果表明:适合鱼腥草种茎萌发的土壤相对持水量(RH)为90%以上;土壤RH高有利于茎的伸长生长和产量的形成,封行期保持土壤RH 85%,花果期保持土壤RH 80%有利于保证鱼腥草产量和较高的营养物质含量;过低的土壤RH使鱼腥草产量下降,营养物质含量略偏低,较高的含水量有利于获得较高产量,但营养物质含量则略有偏低。

The effect of soil moisture on germination, growth, yield and nutrient composition of Hottttuynia cordata Thurtb were studied with the potted experiment method, in order to reveal the water metabolism law of HCT and give a correct guidance in the standard-drafting out of operation procedure of H. cordata Thunb cultivation.The results indicated, the optimona soil relative water-retaining capacities （RH） for breeding stems germination of H. Cordata Thunb was 90% and the high soil RH was beneficial to stem elongation and yield formation.The RH of 85% in the soil during covering row space stage and the soil RH of 80% during flowering and fruiting stage were beneficial to higher yield and the higher nutrient value.The excessive low soil RH made the yield and nutrient value of H. cordata Thunb reduction and the excessive high soil RH could promote high yield but nutrient value.