土壤肥力管理对双季玉米氮素利用效率和温室气体排放的影响

来源 :中国农业科学院 | 被引量 : 0次 | 上传用户:shi_shui_wen
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
随着全球人口的迅速增长,亟需通过科技创新来提高粮食产量,以满足人类的食物需求。土壤肥力管理在作物高产高效中发挥着重要作用。施肥是土壤肥力管理的关键措施,不仅有助于改善土壤肥力,也可以促进作物增产。但不合理的施肥措施不仅降低氮肥利用效率,还增加温室气体排放。为探明不同施肥措施对双季玉米生产力、碳氮排放及氮素利用的影响,本研究于2015年和2016年借助江西进贤的长期定位试验,对长期不施肥(CK)、有机肥(OM)、无机氮肥(N)、NPK、2NPK和NPKM(NPK+OM)的六种措施进行了系统监测,比较分
其他文献
By adjusting the pressure grads in the stage of formation of the shock wave,a successful prompt explosion process has been numerically simulated through a proge
A shaped annular beam tri-heterodyne confocal microscope has been proposed to improve the anti-environmental interference capability and the resolution of a con
Based on NII spectra, some transition probabilities for 2p4f-2p3d and 2s2p23d-2s2p23p are obtained by a semiclassical method. The results are in good agreement
A systematic study on the structure and electronic properties of gold clusters doped each with one copper atom has been performed using the density functional t
We propose a scheme for teleportation of an unknown N-atom state using a two-atom entangled state within a cavity QED and show the feasibility in experiment.Our
A complex optical model potential modified by incorporating the concept of bonded atom, which takes into consideration the overlapping effect of electron clouds
In this paper the dependence of structural properties of the quateary CuIn1-xGaxSe2 films with tetragonal structure on the Ga content has been systematically in
玉米是全世界最重要的粮食、饲料和经济兼用作物,但是玉米中赖氨酸的含量偏低,每百克含赖氨酸仅2.5g左右,而赖氨酸是人和畜禽必须的营养,这样导致玉米中蛋白质的利用率很低。增加玉米中蛋白质和赖氨酸含量,促进人和动物对其蛋白质的消化吸收,将提高玉米的利用价值。传统的育种方法在一定程度上提高了赖氨酸的含量,但是提高的潜力不大,费时费力。现代分子生物学和生物技术的迅速发展为使用基因工程技术手段来实现玉米品质
In this paper, a new mechanism for the emergence of scale-free distribution is proposed. It is more realistic than the existing mechanism. Based on our mechanis
正确使用语言文字,加强新闻语言的规范化,对于提高新闻报道质量,是十分重要的一环。新闻报道要求真实,它的用语就必须准确、明白。否则,就会影响到新闻宣传的实际效果。为了