巨峰葡萄9种元素缺素症的研究OA北大核心CSTPCD

In order to reduce the adverse effects of nutrient deficiency disorders on the production and cultivation of Kyoho grape(Vitis vinifera×Vitis labrusca),this experiment was aimed to compare the difference of phenotype and physiological indicators among different nutrient deficiency treatments(-N、-P、-K、-Ca、-Mg、-Fe、-B、-Zn、-Cu).One-year-old Kyoho cutting seedling cultured in Hoagland nutrient solution and nutrient-deficient nutrient solution were used as materials.The results indicated that Kyoho seedling express the symptoms earlier under the-N,-Ca,-Mg and-Zn treatment.The plants had week resistance,severe symptoms and higher mortality under-Zn treatment.When the plants were deficient in N and P,the veins of old leaves turned yellow,and the yellowing area gradually spread to the surrounding mesophyll.The mesophyll of old leaves turned yellow when K and Mg were deficient,whereas the mesophyll of new leaves became chlorotic when Ca and Cu were deficient.The veins were still green when K,Mg,Ca and Cu were deficient.Old leaves were mostly in the shape of'mosaic leaves',and dead spots and scorched leaves were common when Fe,Zn and Cu were deficient.The plant growth was significantly inhibited by nutrient deficiency,especially N and Zn deficient.The chlorophyll content was significantly reduced by nutrient deficiency,but had little effect on leaf shape.MDA content and APX activity showed an overall trend of increasing and then decreasing when nutrient deficient happen.In general,Kyoho was more sensitive and less tolerant to Zn deficient,and more tolerant to P deficient.This experiment provides a reference for early nutritional diagnosis and guidance of field fertilization by observing the apparent differences in nutrient deficiency and growth indicators such as plant height and chlorophyll content in grape.The results of this study provide reference for early nutrition diagnosis and fertilization guidance in the field.