【摘要】 在宜城市和枣阳市开展控氮增钾控制小麦病害发生的试验研究。结果表明,合理控施氮肥和增施钾肥,可控制小麦病害的发生,收到增产、增收的效果。田间所施氮肥量与病害之间呈正相关关系。当所施纯氮在0～20kg/667m2之间时,随着施用量的增加,病害发生和为害呈上升加重趋势。根据收益分析,在小麦生长的全生育期内,田间每667m2施纯氮10～12.5kg较适宜。增施钾肥不仅能延迟小麦条锈病的始见期,还能明显降低条锈病、纹枯病、赤霉病等的发生程度,减轻其为害。同时,适量增施钾肥还能增加小麦千粒重,提高小麦产量。在每667m2施10kg纯氮和5kg纯磷的情况下,以施纯钾肥11kg产量最高。更多还原

【Abstract】 Field experiments of controlling wheat diseases by increasing K fertilizer and controlling N fertilizer were applied in Yicheng and Zaoyang. Results showed that applying N fertilizer and increasing K fertilizer reasonable could control diseases, improve wheat yields, enhance farmer’s income. The amount of N fertilizer used in the field had positive correlation with the occurring level of wheat diseases. Occurring lever of wheat diseases increased with an increase in the amount of N fertilizer used in the field when the amount of N fertilizer used was between 0 to 20 kg/667m2. According to the economic benefit, 10～12.5 kg/667m2 was appropriate in whole growth period. Enhancing the amount of K fertilizer used in the field could not only delay the occurrence of stripe rust in wheat, but also lighten the occurring level of stripe rust in wheat, wheat sharp eyespot, Fusarium head blight, etc. In addition, increasing the amount of K fertilizer could improve yields, yields was the highest when K fertilizer was 11 kg/667m2 in the condition of 10 kg/667m2 N fertilizer and 5 kg/667m2 P fertilizer.更多还原