土壤改良剂对土壤水分及燕麦产量的影响

试验设聚丙烯酸钾、聚丙烯酸钾+腐殖酸、聚丙烯酰胺、聚丙烯酰胺+腐殖酸、腐殖酸和对照共6个处理,研究了土壤改良剂对土壤含水率、水分利用效率(WUE)以及燕麦产量的影响。结果表明,各土壤改良剂处理均能提高0～40cm土层土壤含水率,其中"聚丙烯酸盐"和"聚丙烯酸盐+腐殖酸"较其他处理效果明显;各土壤改良剂处理的燕麦产量均高于对照,燕麦穗数、穗粒数和千粒质量也有明显提高,其中"聚丙烯酸盐+腐殖酸"产量较高,较对照增产44%,其千粒质量增加最显著;不同土壤改良剂对提高燕麦WUE均有效果,其中复配方式高于单一施用方式,"聚丙烯酸盐+腐殖酸"处理WUE最高,为7.14kg/(hm2.mm),"聚丙烯酰胺+腐殖酸"次之。表明土壤改良剂的应用改善了农田土壤水分状况,提高了降水利用率,从而提高了燕麦产量,以"聚丙烯酸钾+腐殖酸"复配处理节水增产效果最显著。

Effects of Soil Amendments on Soil Water and Yield of Oat

An experiment was conducted with 6 treatments(kalium polyacrylate,kalium polyacrylate+humic acid,polyacrylamide,polyacrylamide+humic acid,humic acid,CK)to study the effects of soil amendments on soil water content,water use efficiency and yield of oat.The results showed that soil amendments could improve the soil water content of each layer in 0~40 cm depth,especially kalium polyacrylate,kalium polyacrylate+humic acid.yields of soil amendment treatments were higher than that of CK;yield of kalium polyacrylate+humic acid was the highest and increased by 44% compared with CK;Spike number,grain number per spike,1000-grain weight of oat after applying soil amendments noticeably increased,and 1000-grain weight increased significantly.Different soil amendments all had an effect on improving water use efficiency;water use efficiency of mixed treatments was higher than that of other single treatments;among them,water use efficiency of kalium polyacrylate + humic acid was 7.14 kg/(hm2·mm) and the highest,polyacrylamide+humic acid the second.The study suggested that application of soil amendments improved soil water status of field and rainfall use efficiency so as to increase yield,and the effect of water saving and production increasing of kalium polyacrylate+humic acid was the most significant.