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土壤水分是制约陕北红枣林健康生长的关键因子.通过土壤水分定位观测,研究不同鱼鳞坑与覆盖措施组合对陕北黄土丘陵区旱作枣园土壤水分的影响.结果表明:鱼鳞坑+树枝覆盖、鱼鳞坑+秸秆覆盖、鱼鳞坑无覆盖处理下0~180 cm平均土壤含水量较裸地分别提高14.2%、9.4%、4.8%.不同处理在红枣生育期均能显著增加土壤表层(0~20 cm)和主要根系层(20~100 cm)土壤水分含量,其中,以鱼鳞坑+树枝覆盖处理效果最为显著.不同组合措施条件下,次降雨量对土壤水分的影响深度主要集中在100 cm以内,对深层土壤水分影响不显著.无覆盖鱼鳞坑措施在高、中、低水分状况下,各土层土壤水分与裸地无显著差异.在陕北旱作枣园,利用修剪枣枝进行覆盖在节省材料减少成本的同时,实现了保墒蓄水目标.
Soil moisture is the key factor restricting the healthy growth of jujube forest in northern Shaanxi.Through the observation of soil moisture, the effects of different scale pit and mulching on the soil moisture of jujube orchard in the northern Shaanxi hilly region were studied.The results showed that: The average soil water content at 0-180 cm under uncoated fish scale pit was increased by 14.2%, 9.4% and 4.8% respectively compared with the bare land. The growth of soil surface (0 ~ 20 cm) and the main root layer (20 ~ 100 cm), of which the effect was most obvious in the case of fish-scale pit + tree branches.The depth of the impact of sub-rainfall on soil moisture mainly concentrated on 100 cm, no significant effect on deep soil moisture.Under the conditions of high, medium and low moisture, no significant differences were found between the soil moisture and bare soil in each layer under the condition of no coverage of fish-scale pit.In the dry cultivation of jujube orchard in Northern Shaanxi, To cover the material to save costs and reduce costs at the same time, to achieve the goal of preserving water storage.