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以不灌水和传统沟灌为对照,研究了不同微喷灌水定额对河南宝丰壤质土壤物理性状和养分运移的影响.结果表明,与传统沟灌相比,微喷可有效控制每次灌水定额,降低土壤容重,微喷定额为24~36 mm,不仅能有效补充土壤水分,又可使土壤湿润层保持在耕层范围内.灌溉后24 h各灌水处理0~30 cm土层中碱解氮含量均高于不灌水,且随着灌水定额的增加,碱解氮含量呈增加趋势,圆顶期则呈现相反的变化,以不灌水最高.传统沟灌水分下渗过深,造成土壤速效养分的淋失,灌水后24 h测定,耕层土壤碱解氮含量低于微喷36 mm处理,速效钾含量低于其他处理,而碱解氮含量在20 cm以下土层、速效钾含量在30 cm以下土层中含量提高.
The effects of different micro-sprinkler irrigation quota on the physical properties and nutrients transport of Baochun loamy soil were studied with non-irrigated and conventional furrow irrigation.The results show that compared with conventional furrow irrigation, micro-spray can effectively control the irrigation standard , Reduce the soil bulk density, micro-spray fixed amount of 24 ~ 36 mm, not only can effectively supplement the soil moisture, but also to keep the soil moist layer within the tillage within 24 h irrigation irrigation 0 ~ 30 cm soil alkali solution Nitrogen content were higher than the non-irrigation, and with the increase of irrigation quota, the content of alkaline hydrolysis nitrogen showed an increasing trend, while the dome showed the opposite change, with the highest non-irrigation.The traditional furrow irrigation water infiltration, resulting in soil quick-effect Nutrient leaching, measured 24 h after irrigation, the content of available nitrogen in topsoil was lower than that in micro-spray 36 mm, the content of available potassium was lower than that of other treatments, while the content of available nitrogen was below 20 cm, The content of soil below 30 cm is increased.