搜索结果: 1-7 共查到“农学 Ca, Mg”相关记录7条 . 查询时间(0.156 秒)
[目的]探讨套袋黄冠梨果实褐斑病的发生机制。[方法]于盛花后36 d对黄冠梨果实进行不同套袋处理;于果实成熟期(盛花后
130 d)每株各选择一个基部主枝统计褐斑病发病率,并采取未套袋果实、套袋后表现正常、发病初期和发病后期的果实各30 个进行
果皮和果肉的Ca、Mg、K含量分析。[结果]套2层纸袋的果实中未发生果皮褐斑病,而套3 层纸袋的果实中发生褐斑病。套袋降低了
黄冠梨果皮中Ca含量...
Clay Minerals, Ca/Mg Ratio and Fe-Al-Oxides in Relation to Structural Stability, Hydraulic Conductivity and Soil Erosion in Southeastern Turkey
Clay minerals structural stability hydraulic conductivity erosion calcium/magnesium ratio
2009/1/12
Studies of clay mineralogy and related chemical composition are rarely connected with implications for soil management in the field. However, this study attempts to manifest the practical utilization ...
套袋对红富士苹果品质和Ca、Mg、K营养的影响
套袋 苹果 矿质营养 生理失调
2009/1/4
分别于盛花后25、35、45、55d对‘红富士’苹果进行套袋(果袋为内层红色袋、外层外灰内黑双层纸袋)处理,结果表明,早期套袋有提高果实单果重的趋势,降低果实可溶性固形物含量,对硬度和可滴定酸影响不大。果实成熟时,不同时期套袋对果肉Ca、K含量没有显著差异,但早期套袋增加果肉Mg含量,降低Ca/Mg比值。同时,在盛花后35d进行3种果袋(内层白、外层外灰内灰双层纸袋;内层黑、外层外灰内黑双层纸袋;...
酸性森林土壤中Ali/(Ca+Mg)摩尔比值的分布特征及影响因素
Ali/(Ca+Mg)摩尔比值 酸性森林土壤 酸沉降
2007/12/18
研究了西南和华南酸性森林土壤中Ali/(Ca+Mg)摩尔比值的分布特征与影响因素,用主成分分析(PCA)和偏最小二乘法(PLS)回归综合评价各种影响因素及其相对重要性. 2000~2002年连续3年的监测结果表明,大多数土壤水中该摩尔比值都小于临界值1.0,说明土壤铝释放还未对植被造成显著伤害.偏最小二乘法(PLS)回归显示,土壤铝饱和度(AlS)是影响A层土壤水中Ali/(Ca+Mg)摩尔比值的...
抗性甜菜夜蛾Na-K-ATP酶、Ca-ATP酶和Ca-Mg-ATP酶对高效氯氟氰菊酯的敏感性
甜菜夜蛾 高效氯氟氰菊酯 Na-K-ATP酶 Ca-ATP酶 Ca-Mg-ATP酶 敏感性
2016/3/29
分别测定了甜菜夜蛾Spodoptera exigua敏感和抗高效氯氟氰菊酯品系神经系统Na-K-ATP酶、Ca-ATP酶和Ca-Mg-ATP酶的活力。结果表明,敏感和抗性品系Na-K-ATP酶活力差异不显著,而抗性品系Ca-ATP酶和Ca-Mg-ATP酶活力明显低于敏感品系。在浓度为1.0×10-8~1.0×10-3 mol/L时,高效氯氟氰菊酯对敏感和抗性品系Na-K-ATP酶、Ca-ATP酶和...
Annual and seasonal changes in mineral contents (Ca, Mg, P, K and Na) of grazed clover-grass mixtures in organic farming
organic farming dairy cows pastures Trifolium repens Trifolium pratense Trifolium hybridum herbage mineral concentrations calcium magnesium phosphorus potassium sodium
2010/8/10
A grazed field experiment was established in 1995 to evaluate alsike clover (Trifoliun hybridum L.), red clover (Trifolium pratense L.) and white clover (Trifolium repens L.) in clover-grass mixtures ...