调环酸钙5%泡腾片调控水稻生长、预防水稻倒伏效果评价

Effects of Prohexadione Calcium 5% Effervescent Tablets(PP) on Rice

为探索新型植物生长调节剂调环酸钙5%泡腾片在北方寒地移栽水稻上应用的可行性,2009年通过田间试验对该药剂的调控水稻生长、预防水稻倒伏效果及对水稻生长的安全性等进行了试验。结果表明,在水稻分蘖末期（拔节前7-10d）施用调环酸钙5%泡腾片180～450 g/hm2（9～22g a.i/hm^2）,一方面对水稻植株具有降低节间长度、矮化植株高度,增加机械强度,提高抗倒伏能力;另一方面具有降低瘪粒率,增加实粒数,从而增加单位面积产量的作用,是实现水稻高产栽培的重要化控措施。

In order to survey the application feasibility of the prohexadione calcium 5% effervescent tablets（PP） on the transplanting rice in cold north region of China,the field trials of the product were conducted in 2009.The results showed that it is beneficial to decrease the internode length,dwarf the rice height,increase the machnical strength,improve the lodging tolerance;and decrease the shrunken grains rate,improve the filled grain number,with the application dosage of 180~450 g/hm2（active ingredient of 9~22 g/hm2） of the product at the late tillering stage（7~10 days before jointing）.It could increase the yield of rice and it is an important chemical controlling measure for the high yield cultivation of rice.