摘要
在相同的氮肥和磷肥施用量基础上，试验研究了不同施钾量对谷子干物质及产量的影响。结果表明，谷子穗干重、叶干重、茎鞘干重与施用钾肥有关，随着施钾量的增加在抽穗期和成熟期的稳干重、叶干重、茎鞘干重都呈现增加的趋势；地上部的干物质积累随着施钾量的增加在各个时期呈现增加的趋势，施钾量在75-150kg/km2时地上部干物积累基本达到最高值；谷子的穗粒重随施钾量增加而提高；有效穗数随着施钾量的增加出现先增加后减小的趋势；谷子的生物产量及经济产量随着施钾量的增加出现先提高后降低的趋势。在施钾量为75-150kg／hm2时，生物产量、经济产量、产值与经济效益最高，确定最佳施钾量为75kg／hm2。
On the bases of same nitrogenous fertilizer and phosphatic fertilizer amount, effect of potassium fertilization on the dry material and yield of millet were studied.The results showed that the dry weight of fringe ,leaf and stem-sheath were affected by the potassium fertilizer,with the increase of potassium amount,the dry weight of fringe,leaf and stem-sheath showed a trend of increase. The accumulation of orgins on the ground increased with the increase of potassium fertilizer amount at all stages. At the potassium amount of 75-150 kg/hm2,the yield reached the highest point. Results also showed that the grain weight went up with the increase of potassium fertilizer amount ,the number of productive ear first went up and than descended, and the biological and economic yield first went up and then down. At the potassium amount of 75-150 kg/hm2, the biological and economic yield reached the highest point and the optimal potassium amount was 75 kg/hm2.
出处
《现代农业科技》
2015年第19期9-10,共2页
Modern Agricultural Science and Technology
基金
国家现代农业产业技术体系项目(CARS-07-12.5-B1)
关键词
谷子
施钾量
干物质
产量
millet
potassium fertilization amount
dry material
yield
