论文部分内容阅读
一、锌肥锌是植物正常生长发育不可缺少的微量营养元素之一。土壤有效锌含量低于1.5ppm的则属缺乏锌的土壤。小麦缺锌时,苗期叶片失绿,心叶花白;中后期节间缩短,植株矮化,中部叶缘过早干裂皱缩;根系变黑,无实小穗数增多,结实率低,产量下降。玉米缺锌时,易发生“花白苗”和“花叶症”,表现为植株矮小,叶片失绿花白,叶片狭窄,表皮毛少,叶片光滑,白化的叶片逐渐枯萎,空秆多,果穗小,缺粒秃顶多。水稻缺锌时,叶片呈现红褐色,远看一片焦枯,植株矮小,很少分蘖。果树缺锌时,叶片失绿,小叶簇生,易患“花叶病”或“小叶病”。
First, Zinc Zinc Zinc is one of the essential micronutrients for the normal growth and development of plants. Soil less than 1.5 ppm of zinc is a zinc-deficient soil. Wheat zinc deficiency, the seedling leaves green, heart leaves gray; internodes shortened, dwarf plants, the central leaf margin premature rupture; roots black, no increase in the number of spikelets, seed setting rate is low, yield decline. Maize zinc deficiency, prone to “white flower seedlings” and “mosaic disease”, manifested as short plants, green leaves whitish leaves, narrow leaves, epidermal hair less, smooth leaves, albino leaves gradually withered, empty stalks and more, ear smaller , Lack of bald and more bald. When the rice is deficient in zinc, the leaves are reddish-brown in color and the plants are dwarfed and rarely tiller when viewed from a distance. Zinc deficiency in fruit trees, the leaves green, leaf clusters, susceptible to “mosaic disease” or “lobular disease.”