化控条件下玉米干物质生产特点与产量变化研究

以玉米品种正大999为试验对象,通过施用4种不同化控剂,重点从干物质生产方面研究了玉米产量变化特点.结果表明,在化控条件下,玉米群体干物质积累量在大喇叭口期和抽雄吐丝期与清水处理差异不显著,成熟期则显著低于对照；玉米矮壮、矮吨、乙烯利、控旺专家等化控处理的玉米产量显著降低,减产幅度在7.1％～18.4％.说明玉米矮壮、矮吨、乙烯利和控旺专家等4种化控剂在当地生产条件下容易造成田间减产,生产上要慎选玉米化控剂,必须进行小面积试验后方可推广.

Study on Dry Matter Production Characteristics and Yield Variation of Maize under Chemical Regulator Control Conditions

The effects of chemical regulator on corn dry matter accumulation and yield variation were studied, four different chemical regulators （Yumiaizhuang, Aidun, Ethephon and Kongwangzhuanjia） were applied on corn variety Zhengda999, re- spectively. The results showed that the difference in dry matter accumulation between chemical regulator treatments and ck（wa- ter treatment） was not significant in the large bell stage, but the dry matter accumulation was significant lower in chemical reg- ulator treatments than ck in mature stage. The average yield of Zhengda999 with the four chemical regulator treatments was 7.1%- 18. 4% lower than ok. These results indicated that these corn chemical regulators is easy to cause reduction of yield, its should be elected carefully before practicing in large area.