PReliminaRy Study on Regulate Technique foR Resisting to Lodging and High Yielding Cultivation of Rice in Cold Region

doi:10.7668/hbnxb.2013.06.028

Abstract

Abstract: With the continuous improvement of mechanization production level, rice lodging issue has seriously affect rice production of Heilongjiang province.In this paper, in order to assembly integrate comprehensive prevent lodging control technology, save the cost of rice production, improve the yield and quality, the preliminary study on combining the potassium, silicon fertilizer and chemical control agent to prevent rice lodging has carried on.Results show that when potash or silicon fertilizer applies individually, lodging resistant effect is not good.Only silicon fertil-izer (500 kg/ha)mixed with high amount of potash fertilization (400 kg/ha) has good anti-lodging effect.Chemical control agent (1.2 L/ha)has obvious effect to prevent lodging.Effect of chemical control agent cooperate with po-tassium silicon fertilizer application to prevent rice lodging is better than that of chemical control agent application.Lodging resistance reason is mainly to reduce the length of the internode 1,2,3,reducing plant height, and improved the prone to lodging third internode of physical properties, increase its internode dry weight and stem thickness.Lodging resistance treatments make yield obviously increase, mainly because increase of the primary and secondary branch number per panicle make grain number per panicle.A good comprehensive prevention regulation cultivation techniques is that potassium silicon fertilizer with nitrogen and phosphorus fertilizer application combine with spra -ying 30%chlormequat-uniconazole ME in 7 days before the jointing stage.

Key words: Cold Region, Rice, Lodging, FeRtilization, Chemical contRol agent

CLC Number:

S511

CHEN Shu-qiang, ZHAO Hai-xin, YANG Li-min, DU Xiao-dong, XUE Jing-fang, JIN Guang-hao, ZHOU Tong, WANG Cui, SHAN Li-li, LI Min, WANG Qiu-yu. PReliminaRy Study on Regulate Technique foR Resisting to Lodging and High Yielding Cultivation of Rice in Cold Region[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(6): 159-165. doi: 10.7668/hbnxb.2013.06.028.

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