坡缕石对马铃薯干物质积累及产量的影响

通过田间试验,研究了坡缕石和氮磷钾肥配施对马铃薯干物质积累的影响及增产效应。结果表明,与单施氮磷钾肥相比,坡缕石和氮磷钾肥配施使马铃薯地上茎叶鲜质量的最大值提高了9.33%~62.74%;在马铃薯生育后期,以900~1 800 kg.hm-2的坡缕石和氮磷钾肥配施,可使马铃薯全株干物质积累量显著提高。坡缕石和氮磷钾肥配施较单施氮磷钾肥,马铃薯产量增加5.57%~27.04%。单施450 kg.hm-2坡缕石和空白对照相比,马铃薯的地上茎叶和块茎的鲜质量、干物质无明显差异,产量增加了4.92%。坡缕石和氮磷钾肥配施,能够增加马铃薯全株的鲜质量和干物质积累量,提高马铃薯产量,且坡缕石用量越大,增效越明显。

Effect of Palygorskite on Dry Matter Accumulation and Yield of Potato

The effect of palygorskite and N、P、K combined application on dry matter accumulation and yield increasing effort was studied by a field experiment. The result showed that, compared with single application of N、P、K, the combined application might not just increase the fresh weight maximum of stems and leaves by 9.33%～62.74%, but also put off the period when that maximum value appeared, the fresh weight of tuber was also increased. In the late growth stage, dry matter accumulation was significantly increased by the combined application when palygorskite was applied at a level of 900 kg·hm~(-2)～1 800 kg·hm~(-2). Compared with single application, the combined application might increase the yield by 5.57%～27.04%. Applying palygorskite of 450 kg·hm~(-2) had no significant difference in fresh weight and dry matter accumulation, while the yield was increased by 4.92%. Both fresh weight and dry matter accumulation might be increased by the combined application, as well as the yield. The more palygorskite was applied, the more yield produced in the range of application.