不同灌溉处理寒地井灌稻田地温和产量构成要素研究

通过田同试验研究了浅水-间歇灌溉（SIT）、湿润-间歇灌溉（MIT）、淹灌（CSF）条件下寒地稻田的0～ 15 cm地温和水稻产量构成因素.结果表明,SrT、MIT田间建立浅水层或无水层,有利于0～ 15 cm的土壤温度的提升.由于Srr和MIT处理显著提高了每穴有效穗数,因而最终分别较CSF增产8.6％和11.9％,但SIT和MIT处理间差异不显著.

Soil Temperature and Yield Structure of Well Irrigation Rice in Cold Area under Different Irrigation Treatments

Soil temperature of 0 to 15 cm soil layer and yield structure of rice were studied in a cold paddy field at Sanjiang Plain in 2011, un-der shallow water-intermittent irrigation （ SIT）, moisture-intermittent irrigation （MIT） and continuous flooding irrigation conditions （CSF）.The results showed that shallow aquifers and anhydrous layer of SIT irrigation and MIT irrigation were beneficial to the enhancement of soil tem-perature of 0 to 15 cm soil layer. The yield of rice under SIT and MIT was respectively 8.6% and 11.9% higher than that under CSF, and thedifference was significant. And the research showed that intermittent irrigation （SIT, MIT） achieved to increase yield mainly through signifi-cant increasing in effective panicles per plant. Yield-increasing under MIT was slightly better than that under SIT, but the difference was notsignificant.