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红麻是喜钾作物,钾素对红麻生长发育的效应极为显著。据研究亩产千斤麻皮,约需钾素50斤,比氮、磷的需要量还多。湛江地区,红麻主要种植在沿江河两岸冲积平原的沙泥田及丘陵浅脚沙泥田和泥质旱坡地。据土壤普查化验测定,有效钾含量一般只有40—65ppm,相当一部分地区还降低到30ppm以下,最低只有8ppm。由于土壤严重缺钾,导致红麻单产下降。为了促进红麻生长发育,提高红麻的产量,我们于1982—1985年开展了红麻增施钾肥的试验及推广工作。现将几年的试验总结如下。
Kenaf is a hi potassium crop, the effect of potassium on the growth and development of kenaf is extremely significant. According to the research mu produce jerk, about 50 pounds of potassium, more than the nitrogen, phosphorus needs more. Zhanjiang area, kenaf is mainly planted in the alluvial plains on both sides of the river sand and mud fields and hilly shallow foot sand muddy fields and muddy slopes. According to soil census tests determined that the effective potassium content is generally only 40-65ppm, a considerable portion of the area is also reduced to 30ppm or less, the lowest only 8ppm. Due to severe potassium deficiency in the soil, kenaf yield decreased. In order to promote the growth and development of kenaf and increase the yield of kenaf, we conducted the experiment and promotion work of kenaf with increasing potassium fertilizer in 1982-1985. Now the test of several years are summarized as follows.