先玉335冠层结构与功能对种植密度的响应及其氮素效应

被引量 : 6次 | 上传用户：wanderooy

【摘要】

：

合理密植是作物高产的重要途径,增加密度会给作物的个体发育和群体建成带来不利影响,本文通过调查种植密度对玉米冠层结构与功能的影响,分析玉米个体和群体对种植密度的响应和适应机制,探索密植条件下构建合理冠层的途径,为密植高产提供理论支持。本试验以先玉335为试验材料,设置37500株/hm~2和67500株/hm~2两种种植密度和施氮量分别为N_(300)(300kg/hm~2)、N_(150)(150

【作者】

：

范盼盼

【机构】

：

中国农业科学院

【发表日期】

：

2017年05期

【关键词】

：

玉米种植密度冠层结构冠层光分布光合生产能力氮素效应

下载到本地 , 更方便阅读

下载此文赞助VIP

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

其他文献

,The non-destructive threshold of the graphite surface by STM in the ultra-fast pulse mode

In this paper single ultra-fast voltage pulses are introduced to the Pt/Ir tip of a scanning tunnelling microscope (STM),and the non-destructive threshold of th

期刊

non-destructive thresholdvoltage pulsescanning tunnelling microscope

,Propagation properties of off-axis Hermite-cosh-Gaussian beam combinations through a first-order op

Based on the Collins integral formula, the analytic expressions of propagation of the coherent and the incoherent off-axis Hermite-cosh-Gaussian (HChG) beam com

期刊

laser technologybeam propagationbeam combinationHChG

,Robust scheme for the generation of entangled states for N atoms in a cavity

A scheme is proposed for the generation of W entangled states for several atoms trapped in a cavity by detecting photon decay. The scheme works in the regime,wh

期刊

entangled statesphotonspontaneous emission

,An exact solution to paraxial propagation of laser beams in longitudinal inhomogeneous plasmas

An exact, general solution for laser beams propagating in longitudinally inhomogeneous plasmas is obtained in the form of the diffraction integral. The Gaussian

期刊

inhomogeneous plasmaslaser beamparaxial propagationexact solution

,Noether-Lie symmetry and conserved quantities of mechanical system in phase space

In this paper, a new kind of symmetry and its conserved quantities of a mechanical system in phase space are studied. The definition of this new symmetry, i.e.

期刊

Noether-Lie symmetrymechanical systemconserved quantityphase space

不同土层深度测墒补灌对小麦耗水特性、产量的影响及其生理基础

2010~2011和2011~2012年小麦生长季，在山东省兖州市小孟镇史王村进行大田试验，供试材料为高产小麦品种济麦22。2010~2011生长季，设置0~20cm（D1）、0~40cm（D2）、0~60cm（D3）和0~140cm（D4）4个测墒补灌土层深度，每个土层深度设7个补灌水平，分别为W1（拔节期目标土壤相对含水量为60%，开花期为60%），W2（拔节期为65%，开花期为65%），W3

学位

冬小麦土层深度测墒补灌耗水特性产量生理基础

,Controlling chaos using Takagi-Sugeno fuzzy model and adaptive adjustment

In this paper, an approach to the control of continuous-time chaotic systems is proposed using the Takagi-Sugeno (TS) fuzzy model and adaptive adjustment. Suffi

期刊

controlling chaosadaptive adjustment mechanismR(o)ssler systemTS fuzzy model

,Stability of dark soliton solutions of the quintic complex Ginzburg-Landau equation in the case of

Dark soliton solutions of the one-dimensional complex Ginzburg-Landau equation (CGLE) are analysed for the case of normal group-velocity dispersion. The CGLE ca

期刊

refractive indexspectral filtering

,Terahertz field-induced modulations of intersubband absorptions in quantum wells

Nonlinear optical properties of intersubband electrons in a 3-level quantum well under intense terahertz field are investigated by using a density matrix appro

期刊

terahertz fieldintersubband transitionsideband absorptionAC-stark splitting

,Differential cross sections of elastic electron scattering from CH4, CF4 and SF6 in the energy rang

We investigate the differential cross sections (DCS) of elastic electron scattering from CH4, CF4 and SF6 at six impact energies in a range of 100-700eV by empl

期刊

differential cross sectionsindependent atom modelelectron-molecule scattering

先玉335冠层结构与功能对种植密度的响应及其氮素效应

其他学术论文