双镇压对土壤条件和小麦生育性状的影响

为探讨小麦前后置双镇压播种机镇压对土壤条件和小麦生育性状的影响，以济麦22小麦为试验材料，开展了播种时双镇压处理试验。结果表明，播种时镇压处理较对照未镇压处理0～20 cm土层含水量增加4.47%,>20～40 cm土层含水量增加0.67%,>40～60 cm土层含水量增加1.62%；镇压后0～20 cm土壤容重增加12.00%,>20～40 cm土壤容重增加7.53%。小麦前后置双镇压播种机镇压可以促进小麦分蘖，单株次生根数增加1.8条(增幅64.29%)，受冻枯叶率降低20%，有效穗数增加31.5万穗/hm²(增幅6.27%)，穗粒数增加1.1粒(增幅3.13%)，产量提高1 201.5 kg/hm²(增幅14.15%)。

Effects of double suppression on soil conditions and growth characters of wheat

n order to investigate the effect of double suppression planter on soil condition and wheat growth character, the experiment carried out double suppression treatment when sowing Jimai 22. The moisture content of 0-20 cm soil layer increased by 4.47% compared with that of control layer (not suppressed). The water content of 20-40 cm soil layer increased by 0.67%, and that of 40-60 cm soil layer increased by 1.62%. After suppression, the bulk density of 0-20 cm soil increased by 12%. The bulk density of 20-40 cm soil increased by 7.53%. The tillering of wheat could be promoted, the number of secondary roots per plant could be increased, the rate of frozen dead leaves could be decreased, and the effective panicle number, grain number per panicle and yield could be increased. The wheat yield can be increased by using double suppression planter.