论文部分内容阅读
小麦孕穗至成熟期需要吸收大量营养物质:吸收氮肥约占全生育期的43％、磷约占75％,钾约占48％。采用叶面喷肥,不仅可以防止小麦脱肥,还能提高粒重,增加产量。 叶面喷氮,能增强光合强度,延长叶片功能期,提高穗粒重。喷稀释尿素液肥,适用于二、三类苗,在孕穗期和扬花期各喷1次,用量为2％(即100斤水加2斤尿素),每亩喷200～250斤溶液,可增产6～8％。
Wheat booting to maturity need to absorb a large number of nutrients: absorption of nitrogen accounted for about 43% of the whole growth period, phosphorus accounted for about 75%, potassium accounted for about 48%. The use of foliar fertilizer, not only can prevent wheat from fattening, but also improve grain weight and increase production. Leaf nitrogen, can enhance photosynthetic intensity, extend the functional period of leaves, improve grain weight. Spray dilute urea liquid fertilizer, suitable for two or three types of seedlings, at the booting stage and flowering each spray 1, the amount of 2% (that is, 100 pounds of water plus 2 kg of urea), spray 200 ~ 250 pounds per acre solution, 6 ~ 8%.