灌溉后通气对盆栽番茄土壤酶活性的影响

为改善作物根系生长环境,采用空气压缩机控制盆栽番茄供气,研究了不同水、气条件对土壤酶活性及盆栽番茄生长的影响。研究结果表明:土壤过氧化氢酶、脲酶和脱氢酶活性在番茄生育期内均呈先增大后减小的变化趋势;不同水分条件下通气处理均能提高过氧化氢酶、脲酶和脱氢酶活性,但以80%田间持水量、通气量系数为0.8组合时效果最好;番茄产量与植株干物质积累在该组合下也达到最高值。说明80%田间持水量、通气量系数为0.8组合可改善番茄根际土壤气体环境,提高酶活性,促进植株生长,提高果实产量。

Influences of Rhizosphere Aeration Supplies on Soil Enzyme Activities for Potted Tomato after Irrigation

In order to improve the growth environment of the root zone,we investigate the effects of different water and rhizosphere aeration supplies on soil enzyme activities and tomato growth by using air compressor to supply gas to potted tomato.The results showed that in the tomato growth period the activities of catalase,urease and dehydrogenase showed a trend of decreasing after initial increase.The activities of catalase,urease and dehydrogenase were improved under the aeration treatment compared to non-aeration in different water conditions,while the irrigation level is 80% of the field capacity and the aeration coefficient is 0.8,the activities of three soil enzyme reached the highest value,and the tomato plant has most dry matter accumulation and yield under this combination.The results prove water(80% of field capacity) and aeration(the coefficient is 0.8) can improve potted tomato root zone environment,increase the activity of soil enzyme,promote the plant growth and increase fruit yield.