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166篇 您的检索式：作者名="Blackmer"

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	题名	作者	年代	出处	被引量
1	Fertilizer-Induced Advances in Corn Growth Stage and Quantitative Definitions of Nitrogen Deficiencies显示文摘Evidence that nitrogen (N) fertilization tends to accelerate maturation as well as increase rates of growth has received little attention when diagnosing N deficiencies in corn (Zea mays L.).Such a tendency could be a potential source of errors when the diagnosis is solely based on comparing plants with different rates of growth.Whether N fertilization could accelerate rates of growth and maturation was tested in a field study with 12 paired plots representing relatively large variability in soil properties and landscape positions.The plots were located under conditions where preplant N fertilization reduced or avoided temporary N shortages for some plants but did not reduce for other plants early in the season.We measured corn heights to the youngest leaf collar,stages of growth and chlorophyll meter readings (CMRs). The added N advanced growth stages as well as increased corn heights and CMRs at any given time.Fertilization effects on corn heights,growth stages and ear weights were statistically significant (P<0.05) despite substantial variability associated with landscape.Reductions in growth due to a temporary shortage of N within a growth stage might be partially offset by longer periods of growth within that stage to physiological maturity.Temporary shortages of N,therefore,may produce symptoms of N deficiency in situations where subsequent additions of N should not be expected to increase yields.Recognition of these two somewhat different effects (i.e.,increase growth rates and advance growth stages) on corn growth could help to define N deficiency more precisely and to improve the accuracy of diagnosing N status in production agriculture.	J. ZHANG A. M. BLACKMER P. M. KYVERYGA B. W. VAN DE WOESTYNE T. M. BLACKMER	2008	Pedosphere2008，18，1：	5
2	Nitrous oxide emission from soils during nitrification of fertilizer nitrogen显示文摘	BREMMER J M BLACKMER A M	1978	Science1978，199，：	1
3	Improved Artificial Feeding System for Rearing the Whitefly Bemisia argentifolii ( Homoptera: Aleyrodidae ) 显示文摘	DAVIDSON E W FAY M L BLACKMER J	2000	Florida Entomologist2000，83，4：	1
4	Inhibitory effect of nitrate on re- duction of N20 to N2 by soil microorganisms 显示文摘	Blackmer A M Bremner J M	1978	Soil Biology and Biochemistry1978，10，3：	1
5	Light reflectance compared with other nitrogen stress measurements in corn leaves显示文摘	Blackmer T Mschepers J S Varel G E	1994	Agronomy Journal1994，86，：	1
6	Orthostatic hypotension in spinal cord injured patients显示文摘	Blackmer J	1997	J Spinal Cord Med1997，20，2：	1
7	Comparison of models for describing corn yield response to nitrogen fertilizer 显示文摘	Cerrato M E Blackmer A M	1990	Agronomy Journal1990，82，1：	1
8	Visually rating the N status of corn显示文摘	Binford G D Blackmer A M	1987	J Prod Agric1987，6，：	1
9	Comparison of models for describing corn yield response to nitrogen fertilizer显示文摘	Cerrato M E Blackmer A M	1990	Agronomy Journal1990，82，：	1
10	Testing soils and comstalks to evaluate nitrogen management on the watershed scale 显示文摘	Balkcom K S Blackmer A M Hansen D J	2003	Journal of Environmental Quality2003，32，3：	1
11	Nitrous oxide emission from soils during nitrification of fertilizer nitrogen 显示文摘	Bremner J Blackmer A	1978	Science1978，199，：	1
12	Caleium influx independent depression of transmitter mislease by 5-HT at camprey spinad cord synapses显示文摘	Takahashi M Freed R Blackmer T	2001	J Physiol(Lond)2001，523，2：	1
13	Changes in nitrogen concentra- tions of corn leaves near silking time 显示文摘	Hout N M Blackmer A M	1990	Communications in Soil Science and Plant Analysis1990，21，2：	1
14	Nitrogen deficiency detection using reflected short wave radiation from irrigated corn canopies显示文摘	Blackmer TM Schepers JS Varvel GE		0，，：	1
15	Effects of acetylene and soil water content on emission of nitrous oxide from soil显示文摘	BREMNER J M BLACKMER A M	1979	Nature1979，280，：	1
16	Use of a chlorophyll meter tomonitor nitrogen status and schedule fertigation for corn 显示文摘	Blackmer T M Schepers J S	1994	J Prod Agric1994，8，1：	1
17	Use of a chlorophyll meter to monitor nitrogen status and schedule fertigation for corn显示文摘	Blackmer T M Schepers J S	1994	J Prod Agri1994，8，1：	1
18	Changes in amino acids in cucumis melo in relation to life-history traits and flight propensity of Bemisia tabaci显示文摘	BLACKMER J L BYRNE D N	1999	Entomol Exp Appl1999，93，：	1
19	Controlled trial of clomiphene citrate and intrauterine insemination in couples with unexplained infertility显示文摘	Deaton JL Gibson N Blackmer KM	1990	Fertil Steril1990，54，：	1
20	Orthostatic hypotension in spinal cord injured patients显示文摘		1997	J Spinal Cord Med1997，20，2：	1

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