论文部分内容阅读
近年来,我区水稻在生长过程中因硫素营养缺乏,使坐蔸发黄的程度愈来愈严重,并导致水稻插秧后返青迟迟,分蘖减少,成熟期延晚,影响全年稻谷产量,是我区水稻增产的一个主要障碍因素.据我们多年的观测研究,水稻缺硫有以下几个原因.一、影响水稻缺硫的主要原因1.氮硫施用比例失调50年代后的相当期间里,我区施用含硫的化肥如硫酸铵和过磷酸钙居多,而70年代以后,则以尿素、碳酸氢铵、硝酸铵、石灰氮和钙镁磷肥等不含硫的化肥为主,再者,氮肥的增加量远高于硫肥,这是导致
In recent years, due to the lack of sulfur and sulfur nutrition during the growth of paddy rice in our region, the degree of yellowing is more and more serious, and the delay of returning green after rice transplanting is delayed, the tillering is reduced, the maturity is delayed, and the annual paddy yield is affected , Is a major obstacle to rice production in our region.According to our many years of observational studies, the lack of sulfur in rice for the following reasons.First, the main reason affecting the lack of sulfur in rice 1. The proportion of nitrogen and sulfur imbalance in the period after the 1950s In our area, sulfur-containing fertilizers such as ammonium sulphate and superphosphate were mostly used. In the 1970s, urea-free, ammonium bicarbonate, ammonium nitrate, lime nitrogen, calcium magnesium phosphate and other sulfur-free fertilizers were the main components. The increase in nitrogen fertilizer is much higher than sulfur fertilizer, which is caused