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早在1938年Arnon证明了锌是高等植物必需的微量元素,但到1966年印度发生了水稻缺锌病害后,缺锌才被确认为水稻栽培上值得注意的问题,也是一个较突出的生理病害。据统计,我省4,800多万亩稻田,常年坐蔸面积约500多万亩,一般比正常田亩产低50—150公斤。1984年全省施锌面积达680.4万亩。据1982年66县124个试验点345项试验结果,施锌后每亩多收稻谷32—155公斤,平均48.12公斤,增产12.61％。
As early as 1938, Arnon proved that zinc was an essential trace element for higher plants. However, zinc deficiency was identified as a noteworthy problem in rice cultivation in India in 1966 after a zinc deficiency disease in rice and a more prominent physiological disease . According to statistics, more than 48 million mu of rice paddy fields in our province have a perennial area of about 500 million mu, which is 50-150 kilograms lower than that of normal fields. In 1984 the province’s zinc area of 680.4 hectares. According to 345 trial results of 124 pilot counties in 66 counties in 1982, 32-155 kg of rice per mu was applied after zinc application, with an average of 48.12 kg and an increase of 12.61%.