滴灌水温对土壤和骏枣树体养分含量的影响

Effects of drip irrigation water temperature on nutrient contents in soil and Jun-jujube trees

【目的】研究滴灌水温对骏枣林土壤和树体养分吸收的影响,为新疆南疆地区红枣栽培提供技术支持。【方法】在新疆南疆地区,以5年生骏枣为研究对象,以自然水温为对照(CK),探讨不同滴灌水温(10,20,30,40℃)对骏枣林下0~10,10~20和20~40 cm土层土壤速效N、速效P和速效K及枣树各器官(果实、枣吊、二次枝和叶片)全N、全P、全K含量的影响。【结果】(1)20℃水温处理可以提高0~10,10~20 cm土层的速效P含量,较CK处理增加32.29%,16.92%;与CK处理相比,10℃水温处理可以提高20~40 cm土层的速效N含量和0~20 cm土层的速效K含量,30℃水温处理可以提高0~10 cm土层的速效N含量和20~40 cm土层的速效P含量,40℃水温处理可以提高10~20 cm土层的速效N含量,但差异均未达到显著水平。(2)CK处理可以提高骏枣叶片的全N、P、K含量和二次枝的全N、全K含量。与CK处理相比,20℃水温处理可以提高骏枣果实中的全N、P、K含量及枣吊全N含量和二次枝的全P含量,其中果实中全K含量较CK显著增加了1.13 g/kg,其他差异均未达到显著水平。40℃水温处理可以提高枣吊的全P、全K含量,但差异均未达到显著水平。【结论】增温水可以提高土壤和树体的养分含量。

【Objective】The effects of drip irrigation water temperature on nutrient absorption in soil and trees were investigated to provide support for Jun-jujube cultivation in southern Xinjiang.【Method】The 5-year-old Jun-jujube trees in southern Xinjiang were selected to investigate the effects of drip irrigation water temperatures(10,20,30 and 40℃)on contents of N,P and K in different depths of soil and organs of Jun-jujube trees(fruits,bearing branches,secondary branches and leaves)using natural water temperature as control(CK).【Result】(1)The 20℃treatment significantly increased available P content in the 0-10,10-20 cm soil layer by 32.29%,16.92%compared with CK.The 10℃treatment increased alkaline hydrolyzable nitrogen in 20-40 cm soil layer and available potassium in 0-20 cm soil layer.The 30℃treatment increased alkaline hydrolyzable nitrogen in the 0-10 cm soil layer and available phosphorus in the soil layer of 20-40 cm.The 40℃treatment increased alkaline hydrolyzable nitrogen in the soil layer of 10-20 cm.The differences in the treatments of 10,30 and 40℃were insignificant.(2)CK increased N,P and K contents in leaves and N and K contents in secondary branches.The 20℃treatment increased N,P and K contents in Jun-jujube fruits,N content in bearing branches and P content in secondary branches.Among them,total K content in fruits was significantly increased by 1.13 g/kg,while other differences were insignificant.The 40℃treatment increased P and K contents in bearing branches.【Conclusion】Increasing water temperature promoted nutrient contents in soil and trees in southern Xinjiang.