摘要
Abstract
[Objective]To clarify the improvement effect of different soil conditioners on continuous cropping soil and the influence on maize yield formation.[Method]Taking"Shengnong No.3"as the experimental corn variety,a total of 4 treatments were set up:CK(no soil con-ditioner),T1(silica-calcium-potassium-magnesium zeolite soil conditioner 1 500 kg/hm2),T2(oyster shell powder soil conditioner 1 200 kg/hm2)and T3(oiltea seed powder soil conditioner 900 kg/hm2),the effects of different soil conditioners on soil bulk density,poros-ity,field water capacity,pH,electrical conductivity,nutrient content and maize yield were studied.[Result]Three soil conditioners signifi-cantly reduced soil bulk density by 3.27%-11.76%,increased soil porosity 3.96%-14.27%,increased the field water capacity by 9.87%-11.74%,and the effect of T2 and T3 were more obvious than that of T1.All the three soil conditioners could reduce soil pH and conductivity to different degrees,and the effect of T2 was more significant,the contents of organic matter,organic carbon,alkali-hydrolyzed nitrogen,available phosphorus and available potassium in T2 and T3 were significantly higher than those in CK,the contents of organic matter and or-ganic carbon were not significantly different between T1 and CK,while the contents of other nutrients were significantly higher than CK.All the three soil conditioners could increase the number of grains per ear,1 000-grain weight of corn,and increase the yield of corn.Among them,the yield of T2 was significantly higher than that of other treatments(9 118.24 kg/hm2).[Conclusion]T2 has the best effect on soil improvement and corn yield increase in continuous cropping field under experimental conditions.关键词
土壤调理剂/连作/改良/玉米/产量Key words
Soil conditioner/Continuous cropping/Improvement/Maize/Yield分类
农业科技
