摘要
在中性紫色土上,施氯50～800ppm对棉株生长发育无不良影响,且产量略高于对照,品质也有所改善。施氯800ppm时,成熟棉株的含氟量:茎杆为0.67%,叶片为3.08%,铃壳为1.00%,根部为0.48%。施氯1600ppm时,幼苗成活率为72.5%,生育期推迟10天左右,株高、果枝数、单株结铃数和铃重及产量均显著下降。施氯3200ppm时,不利影响更为严重。因此,中性紫色土棉花施氯临界值为800ppm。
On the neutral purple soil Cl^--supply of 50—800 ppm has no harm to the growth, yield and fiber quality of cotton, but 1600 ppm has an obviously unfavorable effect. Compared with the check, its survival rate of seedling is only 72.5% and its growth—stages are about 10 days later. Its plant height, numbers of fruiting branches and bolls per plant as well as boll weight are markedly decrease. Its seed cotton yield decreases by 24.4% and its fiber quality is lower. Cl^--supply of 3200 ppm even has a more serious effect. Therefore, the critical value of tolerance to Cl^--concentration of cotton on neutral purple soil may be about 800 ppm.
出处
《西南农业大学学报（自然科学版）》
CSCD
1990年第6期632-634,共3页
Journal of Southwest Agricultural University
关键词
棉花
耐氯
临界值
cotton
chlorine
critical value
