土壤紧实胁迫对黄瓜生长、产量及养分吸收的影响

用容重分别为1.2、1.4和1.6.g/cm3的土壤进行盆栽试验,研究了土壤紧实度对黄瓜生长、产量及养分吸收的影响。结果表明,当土壤紧实度增大时,黄瓜秧苗的株高在定植后的15.d后受到显著抑制;第4叶的叶宽和叶长在定植后9～17.d内增加;茎粗则是在稍紧的土壤中(R.1.4)最大,过紧的土壤中(R.1.6)最小;根系伸长生长受阻,干物质质量及活力显著下降,根冠比降低;生物学产量、经济产量、经济系数的变化情况及植株对氮、磷、钾吸收量的变化与茎粗的变化趋势相同。在本试验条件下,容重为1.2.g/cm3的土壤利于株高及根系的生长,容重1.4g/cm3的土壤则利于茎粗、根系养分的吸收及产量的增加。

Effects of soil compaction stress on the growth, yield and nutrient uptake of cucumber

A pot culture experiment was conducted to investigate the effects of soil with different bulk densities(1.2、1.4 and 1.6 g/cm³)on the growth,yield and nutrient uptake of cucumber plants.The results showed that the increase of soil compaction depressed plant height of cucumber seedling significantly after planting 15 days;the width and length of the forth leaf after fix planting 9～17 days increased;stem thickness of plants,biological yield,economic yield,economic coefficient and total absorptive capacity of N,P and K were the largest in the slightly compacted soil(R1.4),while those parameters are the lowest in the most compacted soil(R1.6).Soil with 1.2 g/cm³ bulk density was most favorable for the plant height and root growth of cucumber plants,and soil with 1.4 g/cm³ bulk density was most favorable for the stem thickness,yield and nutrient uptake of cucumber plants under this experiment conditions.