不同水分管理措施对抽梢期油茶树体养分含量的影响

为探讨不同水分管理对抽梢期油茶树体养分状况的影响,从而为油茶水分管理提供科学依据。以‘长林4号’5年生油茶为试材,设置滴灌+花生秆+稻草、滴灌+生态膜、滴灌+油茶壳、滴灌、滴灌+黑地膜、花生秆+稻草、生态膜、油茶壳、黑地膜、不覆盖不灌水(CK)共10种水分管理措施,测定不同水分管理措施下抽梢期树体各器官氮、磷、钾养分含量,并对各养分分布特征进行了分析。结果表明:不同水分管理措施对抽梢期油茶老叶和根N、P、K含量、新叶P、K含量以及枝条P养分含量影响差异显著。不同水分管理措施对抽梢期老叶、根养分含量具有明显促进作用,对当年生新叶和枝条的影响比较小。滴灌+花生秆+稻草处理和滴灌+黑地膜处理更有利于养分的积累,滴灌+花生秆+稻草处理是最经济最环保的水分管理措施。

Impacts of different water management measures on nutrient contents in Camellia oleifera at shooting period

In order to discuss the impacts of different water management measures on tree nutrient condition in Camellia oleifera at shooting period,and to provide some scientific basis for water management of C.oleifera,using 5-year-old trees of ‘Changlin No.4’ in C.oleifera as experiment materials,the contents of nitrogen,phosphorus and potassium in each organ of trees were determined at shooting period in 10 water management measures and their distribution characteristics were analyzed,including drip irrigation + peanut stalk + straw,drip irrigation + eco-film,drip irrigation + C.oleifera shell,drip irrigation,drip irrigation + black film,peanut stalk + straw,eco-film,C.oleifera shell,black films and CK (no mulching and irrigation).The results showed that different water management measures had significantly different impacts on N,P and K contents in old leaves and roots,P and K contents in new leaves and P content in branches at C.oleifera shooting period.Different water management measures had obvious promoting impacts on nutrient contents in old leaves and roots at shooting period,but had small impacts on annual new leaves and branches.The treatments of drip irrigation + peanut stalk + straw and drip irrigation + black films was better for nutrient accumulation,and the treatments of drip irrigation + peanut stalk + straw was the most economical and most environment-friendly water management measure.