稻草覆盖量对冬作马铃薯产量、商品率及经济效益的影响

通过布置稻草覆盖田间试验，探讨稻草覆盖量对冬作马铃薯产量、商品率和经济效益的影响，最终拟定适宜当地的稻草覆盖量。结果表明，不同稻草覆盖量对产量的影响达到0.05的显著水平，其中覆盖4 500 kg/hm2稻草处理（S300）商品薯产量和总产均最高，但S300、S400（6 000 kg/hm2）和S500（7 500 kg/hm2）处理的商品薯产量和总产之间的差异没有达到0.05的显著水平。稻草覆盖量各处理的商品率之间没有显著差异，平均达到95％以上。就经济效益而言，S300处理最高，显著高于S200（3

Effects of Straw Coverage Doses on Yield, Quality and Profit Parameters with Winter Potato

This study aimed at through field experiment with straw coverage, probing into the effects of straw coverage doses on the yield, the rate of marketable potato and economic profit in order to determine straw coverage doses suitable to local conditions. The main results showed that the influences of different doses on the yield of winter potato were significant at 0.05 level, in which both marketable potato yield and total yield of the treatment with 4 500 kg/hm2(S300)was the highest, but no marked differences(p>0.05)between the yields with S300, S400(6 000 kg/hm2)and S500(7 500 kg/hm2)were found(p>0.05). There existed no significant differences among all the treatments in terms of the rate of marketable potato. As for economical profit, that of S300 was the most, higher than those with both S200(3 000 kg/hm2)and S0(0 kg/hm2)significantly(p<0.05), but no significant difference compared with S500 and S400(p>0.05); and there was no marked difference between S200 and S0 with economical profit. Considering the above integrated effects of straw coverage, it was shown that the coverage dose range between 4 500~7 500 kg/hm2 was appropriate in the conditions under consideration.