科尔沁沙地休眠燕麦行距和播量效应研究

摘要： 在科尔沁沙地东部连续两年进行燕麦种植试验，研究行距与播量对休眠燕麦物候期、地上、地下生物量、籽粒产量及植被覆盖度的影响。试验结果表明：2007年各处理中，行距为15cm、播量为150kg/hm2组合地上生物产量和籽粒产量分别为1520.1kg/hm2、、688.9 kg/hm2，具有较大优势。2008年，各处理中，行距为25cm、播量为150kg/hm2组合地上、地下生物产量分别为3200.2kg/hm2、、2773.6kg /hm2，籽粒产量为1400.0 kg/hm2，具有较大优势。收获后，2007年，不同处理植被覆盖度为21.7%-68.1%，其中A1B2处理植被覆盖度最高；2008年，不同处理植被覆盖度为39.6%-79.9%，A2B2处理植被覆盖度最大，为79.9%。结果表明，行距和播量对燕麦产量及植被覆盖度均有影响，根据降水情况，A1B2,A2B2处理在产量和防风蚀方面具较大优势。初步表明燕麦在当地条件下可正常生长，其根茬可以起到防风蚀、改善当地生态条件的效果。

Studies on different row spacing and seed rates of oat in Horqin Sandy Land

Abstract: The aim of present study is evaluation of the effect of different row spacing (15cm, 25cmand 35cm) and seed rates (100 kg/h, 150 kg/h and200 kg/h) on growth, biomass production (above and below ground), and grain yield of oat in east part of Horqin sandy land, Northern China. The study also aims to determine a combination of row spacing and seed rate for maximum vegetation coverage to prevent wind erosion in the soil. The result indicates that the combination of 150 kg/h seed rate of with 25 cm row spacing perform best with production of 3200.2kg/hm2 above ground biomass, 2773.6kg /hm2 below ground biomass and 1400.0 kg/hm2 grain yield in 2008. The same combination also shown height vegetation coverage (79.9%) provided by standing stubbles after harvest. And the result indicates that the combination of 150 kg/h seed rate of with 15 cm row spacing perform best with production of 1520.1kg/hm2 above ground biomass, and 688.9kg/hm2 grain yield in 2007. The result indicates that oat can grow well in sandy soil in addition it can effectively control wind erosion and improve the local environment.