植物营养与肥料学报Issue(2)：271-279,9.DOI:10.11674/zwyf.2014.0202
施氮量对四川盆地机播稻茬麦生长发育及氮素利用的影响
Effect of N rates on growth, development and N utilization of mechanical sowing wheat in rice-wheat cropping system in Sichuan Basin
摘要
Abstract
The effects of different N application rates on the growth , development and N utilization of mechanical sowing wheat in rice-wheat cropping system were studied from 2010 to 2012 in Guanghan City , Sichuan Province . Four N rates were designed:0, 105, 150 and 195 kg/ha in the experiments.The results show that the increase of N rate is good for increasing the tillering ability , the numbers of effective spike , spikelet and grain per spike , but a bit of unfavorate to the grain filling .The highest yield were achieved when the N rate was 150 kg/ha in the two growing seasons and all the experimental sites with different soils textures ., When the N application rate were higher than 150 kg/ha, the yield increase less or even start to decline .Although the N accumulation and N content in the plants are continuing increase , the corresponding N agricultural use efficiency , N productivity efficiency , N uptake efficiency and N utilization efficiency are all declined , and the N harvest index and apparent N recovery efficiency have no significantly changes from 105 kg/ha to 195 kg/ha.Therefore, applying 150 kg/ha is recommended for higher yield and highest profit in the current production levels of Sichuan Basin .关键词
氮/稻茬麦/产量/氮素利用Key words
N/wheat after rice/yield/N use efficiency分类
农业科技引用本文复制引用
李朝苏,汤永禄,吴春,吴晓丽,黄钢..施氮量对四川盆地机播稻茬麦生长发育及氮素利用的影响[J].植物营养与肥料学报,2014,(2):271-279,9.基金项目
国家小麦产业技术体系（CARS-3）；四川省科技支撑计划项目（2011NZ0098-15，2010NZ0104）资助。 （）
