叶面喷施沼液对春小麦生产的影响

Effects of Spraying Biogas Slurry on Spring Wheat

为探讨叶面喷施沼液对春小麦产量的影响,寻求有利于其增产的最佳沼液喷施浓度,对比分析了不同浓度的沼液喷施春小麦生长中的锈病发病率和死苗率以及不同气象要素特征对于沼液喷施的影响,其结果说明:沼液喷施浓度影响较大,其中65%浓度进行叶面喷施,效果最好,增产22.8%;75%浓度进行叶面喷施,效果次之,增产15.2%;浓度超过85%进行叶面喷施,有烧苗现象发生,会造成轻微减产;使用65%浓度的沼液进行叶面喷施可以使锈病发病率和死苗率同时达到最低;7～8月气象要素特征最适宜进行沼液喷施。所以使用适宜浓度,可以明显促进春小麦的生产,提高产量,对青海东部地区充分利用沼液进行无害化农业生产提供了理论依据和技术支持。

To explore the effects of foliar spraying with biogas slurry on the growing of spring wheat and find out the most suitable spraying concentration of biogas slurry, the different spraying concentrations of biogas slurry were experimented and analyzed, and the effects of different characteristics of meteorological element on foliar application of biogas slurry were discussed. The results showed that the spraying concentration of biogas slurry had significam effect on spring wheat. Foliar spray of 65% biogas slurry concentration has the best effect, with which 22.8% of increase in yield was reached, and 15. 2% of yield increase was for 75% biogas slurry spraying. Foliar spray of more than 85% biogas slurry concentration may lead to the seedlings burnt and cause slight yield reduction. And spraying with 65% biogas slurry was also suitble for minimizing rust incidence and dead seedling rate. And the weather characteristics in July and August are most suitable for biogas slurry spraying.