【摘要】 研究结果表明，不同种植密度下的不同小麦品种花期叶面喷施MS增抗剂、丰收素及481，有显著的促粒增重和增产效应。每穗增加0．5～3．3粒；每粒平均日增重0.1346～0．5110mg；穗重增加41．81～109．78mg；每穗干物质日积累量灌浆前期较对照平均增加2269mg/d·穗，中期增加16.11mg/d·穗，后期降低10．07mg／·d穗；净增产375～1500kg／hm2。其中，MS增抗剂促粒增重效应最为显著，每穗净干物质积累量比对照高177.87mg，灌浆速度最大值的出现比对照提前1．1～2．4d。更多还原

【Abstract】 This study indicates that application of MS resistance promoter, Fengshousu, Brassinolid on the leaf during the period of flowing significantly influence on increasing weight and number of grains in different densities for varlous types of wheat varieties. A spike and grain increase 4l. 81～109. 78 mg and 0. 1346～ 0. 5110 mg/day respectivcly. Number of grains per spike increase 0. 5 ～ 3. 3. Amount of daily dry matter is 16. 11 ～ 22. 69 mg more than and 10. 07 mg less than that of the check during the primary,intermediate and advanced filling stage respectively. Maximum filling velocity appeared 1. 1 ～2. 4 days earlier than the check The net inereasing yield is 375～ 1500 kg/hm2. Among the agents, MS has the best effectiveness on inereasing weight and number of grains with net dry cumulative matter of 177. 87mg/spike more than the check. Therefore it can speed up maturity of wheat.更多还原