不同时期喷施腐植酸水溶肥对高粱农艺性状及产量的影响

Effects of Humic Acid Water-soluble Fertilizer Application on Agronomic Characters and Yield of Sorghum at Different Periods

为了探究不同时期喷施腐植酸水溶肥对高粱农艺性状和产量的影响,并明确最佳喷施时期,以黑龙江主栽高粱品种“齐杂722”为试验材料,采用随机区组设计,分别于苗期、拔节期、孕穗期、抽穗开花期、灌浆期叶面喷施腐植酸水溶肥(600倍液)。结果表明:与CK相比,不同生育时期喷施腐植酸水溶肥可显著增产,增产幅度为5.5%~7.8%;苗期、拔节期、孕穗期喷施腐植酸水溶肥可显著提高高粱株高、穗长、穗粒数、穗粒重;抽穗开花期和灌浆期喷施腐植酸水溶肥可显著提高高粱穗粒重、千粒重,并改善光合特性;总体来看,灌浆期喷施腐植酸水溶肥增产效果最好,孕穗期喷施腐植酸水溶肥增产效果次之。

In order to know the effect of spraying humic acid water-soluble fertilizer in different stages on sorghum agronomic traits and yield,and to determine the best spraying period of the main sorghum variety“Qiza 722”in Heilongjiang Province,randomized block designs were used to spray humic acid water-soluble fertilizer(600 times liquid)on the leaf surface of sorghum at seedling stage,jointing stage,booting stage,heading and flowering stage,filling stage,respectively.The results showed that compared with CK,spraying humic acid water-soluble fertilizer could significantly increase the yield by 5.5%~7.8%during different growth stages.Plant height,ear length,grain number per ear and grain weight per ear of sorghum significantly increased by spraying humic acid water-soluble fertilizer at seedling stage,jointing stage and booting stage.Spraying humic acid water soluble fertilizer at heading and flowering stage,filling stage could significantly increase grain weight per ear,1000 grain weight,and improve photosynthetic characteristics of sorghum.The best effect of spraying humic acid water-soluble fertilizer occured at filling stage and booting stage was the second best.