一次性施用控释肥对水稻植株生长及产量的影响

连续两年(2002—2003年)共4季的盆栽试验,研究了几种国产控释肥一次性施用对水稻植株生长和产量的影响。结果表明,国产控释肥1一次施用(BNCRF)、国产控释肥2一次施用(BLCRF)和国产聚合物包膜尿素复混肥一次施用(BRCU)处理的水稻分蘖动态与水稻专用肥一次施用(BNRSF)和分次施用(SNRSF,对照)处理间非常接近。等养分比例的控释肥与专用肥处理间水稻株高也无明显差异。施用控释肥明显影响地上部生物量变化,在水稻生长前期BNCRF处理显著增加,BLCRF处理早稻增加,晚稻降低,而BRCU处理早、晚稻均明显降低;收获期3种控释肥处理较对照SNRSF处理均显著提高。一次性施用控释肥处理均显著增加了水稻成穗数,每穗粒数亦有增加趋势,但对粒重无明显影响;BNCRF、BLCRF和BRCU处理稻谷产量比SNRSF处理早稻分别增产10.75%、15.81%和15.91%,晚稻分别增产7.66%、4.76%和14.05%,而专用肥BNRSF处理稻谷产量与SNRSF处理无明显差异。

Effects of single basal application of controlled-release fertilizers on growth and yield of rice

Pot trials were conducted in 2002 and 2003 consecutively to investigate the effects of single basal application of three domestic controlled-release fertilizers(CRFs) on growth and yield of rice.It was showed that tillering dynamics(under) the treatment of the three CRF,single basal of application of Nongke controlled-release fertilizer(BNCRF),controlled-release fertilizer with NH_4MgPO_4 coated(BLCRF) and blend fertilizer with resin coated urea(BRCU),were very similar to those of the two specific-fertilizer treatments(SF),single basal of application of Nongke rice-specific fertilizer(BNRSF) and split application of Nongke rice-specific fertilizer(SNRSF).There was also no significant deference in plant height between treatments of the CRF and the SF.However,the application of CRFs had a markedly effect on dry matter yield(DMY) comparing to SF.At the primary growth stage,in comparison with SNRSF,BNCRF increased the DMY of both early and late crop significantly,while BRCU decreased DMY of both crop,BLCRF increased DMY in early crop but decreased in late crop,however,all the three CRFs significantly increased DMY at mature stage.Single application of the three CRFs could significantly increased productive panicles grains per panicle,but did not significantly(affected) grain weight.The grain yields of BNCRF,BLCRF and BRCU were 10.75%,15.81% and 15.91% higher than SNRSF in early crop,and 7.66%,4.76% and 14.05% higher in late crop,respectively.There was no significant difference in grain yield between the two SF treatments.