摘要
合理施用磷肥必须讲究施用方法,但对施用方法至今看法不一,一般多主张集中条施或穴施,而不赞成撒施或混施。为了探讨这一问题,经多年的盆栽试验和田间试验的研究表明,在盆栽条件下,集中施与混合施在大多数情况下肥效基本相同,有时混施还较集中施为好,在田间旱作条件下,深施作基肥较浅施作种肥好,撒施较条施略优。据此提出,在缺磷的石灰性土壤上。对旱地小麦而言,当水溶性磷肥用量较多时,最好用作基肥;施用方法以采取撒施为好;施用深度以15cm左右为宜。
Rational application of P fertilizer must be dependent upon the fertilizerapplication method.Nevertheless,opinions differ in this problem up till now.In general,the majority advocate the concentrated banding application or pitapplication,and are not in favour of broadcasting or mixturing application.Inorder to probe into this problem,we have carried out pot and field experimentsfor many years.The research results showed that under the pot cultivation,concentrated application and mixturing application had the same fertilizer effectsin most cases,and that sometimes,mixture application was better than concen-trated application.In the dryland conditions,deep application as the base ferti-lizer was better than shallow application as seeding fertilizer,and broadcastingapplication was slightly better than banding application,on the basis of whichwe suggested that as to the dryland winter wheat in calcium soil deficient inp fertilizer,it is better to use p fertilizer as base fertilizer when a largeamount ofsoluble p fertilizerwas used.Broadcasting application can be usedwith 15 mc or so deep as the optimum.
出处
《干旱地区农业研究》
CSCD
北大核心
1991年第3期21-28,共8页
Agricultural Research in the Arid Areas
关键词
小麦
施肥
磷肥
旱地
土壤
石灰性
P fertilizer
broadcasting application
banding application
winter wheat
dryland
calcium soil
