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《Journal of Southern Agriculture》 2015-09
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Effect of plant growth regulator on dry matter accumulation in upper and central parts and yield of soybean

WANG Bao-sheng;LIU Chun-juan;FENG Nai-jie;ZHENG Dian-feng;GONG Xiang-wei;SUN Fu-dong;LIU Tao;HE Tian-ming;WANG Chang;Qixingpao Farm of Nenjiang County;Agricultural College,Heilongjiang Bayi Agricultural University;  
【Objective】The present experiment was conducted to investigate effects of spraying plant growth regulators(PGRs) on dry matter accumulation of soybean at grain-filling stage, in order to provide scientific basis for high-yield cultivation technique of soybean. 【Method 】Using soybean Hefeng 50 as materials, the field experiment was conducted by using 3 treatments. The retardant regulator uniconazole(S3307) and growth promoter regulator 2-N, N-diethylamino ethyl caproate(DTA-6) were sprayed on soybean plant one time at beginning-flower stage, taking soybean plant sprayed with water as control( CK). The samples began to be collected at grain-filling stage( from the 30 thday after spraying), once every five days, a total of 5 times. The dry-matter weights of leaf, petiole, stem, pod and grain from upper and central parts were measured, respectively, and the grain yield of soybean was investigated at mature stage. 【Result】The results showed that, during whole grain-filling period, the dry-matter weight of upper leaves sprayed with S3307 was higher than that of CK; the dry-matter weight of upper leaves sprayed with DTA-6 was higher than that of CK at grainfilling stage, excepting on the 35 thand 40thday; the dry-matter weight of central leaves sprayed with DTA-6 and S3307 was higher than that of CK, excepting on the 45 thand 40thday; the dry-matter weight of upper petiole sprayed with S3307 was higher than that of CK, excepting on the 30thday; the dry-matter weights of central petiole sprayed with S3307 and upper stems sprayed with DTA-6 were higher than that of CK; the dry-matter weights of central pod shells and grains sprayed with DTA-6 and S3307 were higher than that of CK, respectively. Furthermore, after spraying S3307 on soybean plant, the pod number and grain weight of upper and central parts per plant were significantly increased(P0.05,the same below),and the shriveled pod number per plant was significantly decreased. After spraying DTA-6, the pod and grain numbers of upper part and grain weight of upper and central parts per plant were significantly increased. Besides, the yield of upper part sprayed with S3307 and DTA-6 were extremely significantly higher than that of CK, increased by 10% and 18%,respectively(P0.01), and the yield of central part increased by 11% and 4% compared with CK. 【Conclusion】The dry-matter weight and yield of upper and central parts is significantly increased by spraying PGRs on leaf surface at beginning-flower stage.
【Fund】: 国家自然科学基金项目(31171503 31271652);; 黑龙江省杰出青年基金项目(JC201309);; 黑龙江农垦总局科技攻关项目(HNK12A-06-03)
【CateGory Index】: S565.1
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