Effect of fertilizer and herbicides in seed tape on rice growth characteristics | 种绳中肥料和除草剂对水稻生长指标的影响

Chinese. 为了优化肥料和除草剂的相关参数,提高种绳直播质量,进一步发挥水稻种绳直播种植技术优势,研究了肥料和除草剂的用量和位置等参数对稻种出苗率、苗高和幼苗期行间杂草密度的影响规律。结果表明:肥料的用量和位置对水稻出苗率和苗高影响显著,添加除草剂对杂草的发生密度有显著的抑制作用,但同时会影响幼苗的生长。在沈阳地区使用本技术的工艺参数是水稻品种为沈稻七号、稻种用量为单粒/穴、种距为30mm;肥料品种为颗粒状磷酸二铵,用量为0.04g.穴-1,肥料与稻种间距为15mm;不使用除草剂。在此参数条件下,稻种出苗率为88.89%,比不加肥料种绳的出苗率(76.67%)提高了15.9%;苗高为77.3mm,与不加肥料种绳的苗高(64.5mm)相比提高19.8%。研究结果对水稻种绳捻制机的设计提供了重要参考。

English. Experiments were carried out in 2009 in Shenyang to study the effect of the rate and position of fertilizer and herbicides in the seed tape on the emergence rate,seedling height and the density of weeds in the paddy field during the seedling stage,so to optimize the rate of fertilizer and herbicides,improve the quality of rice seed tape for direct sowing,which could further develop the advantages of the direct sowing technology.The results showed that the rate and positions of fertilizer had significant effect on the germination rate and seedling height.It also showed that herbicides in the seed tape could significantly decrease weed densities,but it also suppressed the growing of rice seedlings.In Shenyang area,the best parameters of the rice seed tape for direct sowing technology were determined.Rice Shendao 7 was tested with single seed per hill,the distance between seeds of 30mm.The fertilizer was granular DAP,with the rate of 0.04g per hill,15mm apart from sedd.No herbicides were applied in the tape.Under these parameters,rice germination rate was 88.89%,increased by 15.9% to the seed tape without fertilizer.The seedling height was 77.3mm,increased by 19.8% to the seed tape without fertilizer.