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2003-2006年,Fast B J等在二代抗草甘膦棉田开展了长芒苋化除适期试验。试验田土壤pH7.1,有机质0.6%。对6cm以下、6～10cm及10cm以上长芒苋,草甘膦的用量分别为0.8,1.1,1.3kg.hm-2;出苗后0～63d,间隔7d,共设9个用药时期;杂草密度为17株.m-2。结果表明,在出苗后0～21d用药,棉花?
2003-2006, Fast B J and other in the second generation of glyphosate-resistant cotton fields carried out in addition to the proper period of Amaranthala test. Experimental soil pH7.1, organic matter 0.6%. For 6cm, 6 ~ 10cm and above 10cm long Amarantha, the amount of glyphosate were 0.8,1.1,1.3kg.hm-2; 0 ~ 63d after emergence, interval 7d, a total of nine drug use period; weeds The density of 17 strains .m-2. The results showed that 0 ~ 21d after emergence of medication, cotton?