Study on Leaf Nutrient Diagnostic Standard of 'Crimson' Seedless Grape with DRIS in Yanqi Reclamation
Qiangqing Zheng · Northern Horticulture · 2013
Using five-year-old 'Crimson' seedless grape of Yanqi reclamation as materials,the method of Diagnosis and recommend-ation integrated system(DRIS) for 'Crimson' seedless grape cultivations by leaves collected from low or high yielding vineyard in Yanqi reclamation and their leaves nutrients were systematically analyzed.At the end,the diagnosis important parameters of DRIS:N/P,N×K,P/K,and formulated the calculation formula of 'Crimson' seedless grape using index diagnosis method of DRIS were determined.The diagnosis chart about leaf nutrition of 'Crimson' seedless grape using diagrammatizing method of DRIS were adopted.The results showed that the adequate ratio among leaf nutrients were as following:N/P=5.4611±0.9629;K×N=243.256±36.1078;P/K=0.3133±0.06.