摘要
在季节外休闲期间,以休闲为对照,采用"天紫22号"糯玉米作为填闲作物种植,通过同位素标记技术以及渗漏计技术,比较不同处理下的氮素去向和夏季填闲作物的提氮作用。结果表明:夏季填闲期间所有处理各土层土壤Nmin均有所降低,以表层0～30cm下降最快,减少量最大。种植糯玉米与休闲处理氮素损失量分别为172.44、224.23kg/hm2,种植填闲作物可有效减少氮素的损失。另外,15 N标记试验表明,在种植填闲作物的条件下,可以有效的减少氮素的淋洗损失,比对照处理要减少11%。试验证实了种植填闲作物糯玉米具有有效利用菜田土壤残留氮与阻控氮淋洗风险的作用,为北方日光温室典型种植模式氮素优化管理提供了科学参考。
In fallow season, two treatments in the experiment,i, e. control（with no crop）and planting catch crop, were conducted. Isotope labeling technique and the lysimeter were used to the＇ Tianzi No. 22＇waxy corn roots sampling, to further verify the role of cultivating the catch crop in reducing nitrogen loss. The results showed that the contents of soil Nmin all treatments were decreased, the amount reduced was maximum in 0-30 cm soil layer;Planting catchcrop may reduce the loss of nitrogen. The loss amounts of planting waxy and fallow treatment were 172. 44,224. 23 kg/hm^2,respectively;^15N experiments showed that plant catch crops waxy corn, can effectively reduce nitrogen leaching losses,compared to the fallow treatment waxy corn can reduce more than 11% nitrogen loss.
出处
《北方园艺》
CAS
北大核心
2011年第13期171-174,共4页
Northern Horticulture
基金
国家自然科学基金资助项目(30671236)
天津市应用基础及前沿技术研究计划资助项目(09JCYBJC08600)
