论文部分内容阅读
花生早衰,即不到成熟期枝叶就衰黄,甚至枯落,因光合作用降低,造成花生结果少,饱果率低,可减产15—30％。究其原因,有的是缺乏营养元素,有的是受旱涝影响,而更重要的是病害的侵染危害。因此只要消除或减弱其起因,就可有效地防止花生早衰。 1.科学用肥。对缺乏营养引起的早衰,应根据缺素症状补充相应的养分。缺氮时,植株矮小、萎黄,叶片窄小,基部叶片黄化脱落,茎皮呈红色,可喷施1—2％浓度的尿素水溶液,5—7天喷一
Peanut premature aging, that is, less mature branches and leaves on the decline of yellow, or even litter, due to lower photosynthesis, resulting in less peanut fruit, fruit full rate is low, cut 15-30%. The reason, some are the lack of nutrients, some are affected by droughts and floods, but more importantly, the damage of the disease. Therefore, as long as its causes can be eliminated or weakened, premature peanuts can be prevented effectively. Scientific use of fertilizer The lack of nutrition-induced premature aging, nutritional supplements should be based on the corresponding lack of symptoms of nutrients. Nitrogen deficiency, plant dwarf, chlorosis, narrow leaves, base leaves yellow off, bark red, sprayable 1-2% concentration of urea solution, spray 5-7 days