近年来,豫南地区(信阳、南阳二个地区和驻马店地区的一部份)随着氮化肥的大量施用和农作物产量逐年的提高,生产中出现了稻麦空秕率增高、千粒重下降、油菜花而不实、紫云英长势衰退等趋势。这些不良趋势已经程度不同地影响了产量的提高,这与土壤缺乏某种 In recent years, along with the large-scale application of nitrogenous fertilizer and the increase of crop production year by year, the south of Henan Province (part of Xinyang, Nanyang and part of Zhumadian area) has witnessed an increase in the rate of emptying of rice and wheat and the decrease of 1000-grain weight in the production. Spend not real, such as the trend of decline in Ziyun Ying. These adverse trends have affected crop yields to varying degrees, which is related to the lack of some