去年,我们进行了小麦穗肥粒肥试验,供试品种为扬麦一号,麦苗生长健壮,3月15日施拔节孕穗肥,每亩硫铵20斤、30斤二种用量;4月28日始穗期,每亩施粒肥硫铵15斤。同时在小区内施相当每亩15斤硫铵的同位素N~(15),进行示踪测定。另设不施穗肥、粒肥作对照区。一、增产效果在小麦亩产500斤的水平上,拔节孕穗期每亩施20～30斤硫铵,或者在始穗期每亩施15斤硫铵,增产效果显著(见表一)。 Last year, we conducted a test of wheat ear fertilizer, the test varieties for Yangmai 1, robust growth of wheat seedlings, March 15 Szeto blubber fertilizer, 20 mu per mu of ammonium sulfate, 30 kg two kinds of dosage; April 28 Beginning of the heading period, 15 kg of fertilizer ammonium sulfate per acre. At the same time in the plot Shi Shi per acre 15 kg ammonium sulfate isotope N ~ (15), tracer determination. Another set of non-panicle fertilizer, grain fertilizer as a control area. First, the yield effect In the level of 500 kg of wheat per mu, jointing booting stage per acre 20 to 30 kg of ammonium sulfate, or 15 kg of ammonium sulfate per acre in the beginning of the ear, the yield was significant (Table 1).