語系:
繁體中文
English
說明(常見問題)
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Characterizing the Nitrogen Benefit ...
~
Lin, Eric Fleming.
Characterizing the Nitrogen Benefit of Alfalfa in California.
紀錄類型:
書目-語言資料,手稿 : Monograph/item
正題名/作者:
Characterizing the Nitrogen Benefit of Alfalfa in California./
作者:
Lin, Eric Fleming.
面頁冊數:
1 online resource (88 pages)
附註:
Source: Masters Abstracts International, Volume: 57-01.
Contained By:
Masters Abstracts International57-01(E).
標題:
Agronomy. -
電子資源:
click for full text (PQDT)
ISBN:
9780355451771
Characterizing the Nitrogen Benefit of Alfalfa in California.
Lin, Eric Fleming.
Characterizing the Nitrogen Benefit of Alfalfa in California.
- 1 online resource (88 pages)
Source: Masters Abstracts International, Volume: 57-01.
Thesis (M.S.)--University of California, Davis, 2017.
Includes bibliographical references
Alfalfa in high-yielding environments fixes significant amounts of atmospheric N?, a portion of which benefits succeeding non-legume crops and reduces fertilizer N requirements by an amount sometimes termed the "legume N benefit." Field research-based estimates of the N benefit in California and other irrigated, semi-arid or arid environments are sparse, with most previous work having been conducted in predominantly rainfed, humid systems. Differences in crop management and growing environment between cropping systems could mean that nitrogen benefits in California and similar environments are different from nitrogen benefits in predominantly rainfed cropping systems. We conducted replicated plot experiments at three field station sites in California using wheat as an indicator crop to assess alfalfa's N contribution to a subsequent crop. The wheat was grown with N rates ranging from 0 to 280 kg N ha -1 after (1) continuous alfalfa ('Following Alfalfa') or (2) sudangrass-wheat ('Following Grains'). Plants were assessed for biomass production, nitrogen uptake, and grain protein content. A growth benefit was observed for plants in the 'Following Alfalfa' treatment for all growth metrics, and wheat in both rotation treatments took up the same amount of nitrogen when supplied with 280 kg N ha -1. Alfalfa's rotational N benefit likely accounted for most of its rotation benefit to wheat, and at one location this benefit was enough that N fertilization had no effect on aboveground biomass. Based on biomass production and nitrogen uptake data, we calculated a nitrogen benefit of between 102 and 114 kg N ha?¹ for wheat following a healthy alfalfa stand in an irrigated semi-arid environment.
Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018
Mode of access: World Wide Web
ISBN: 9780355451771Subjects--Topical Terms:
1027735
Agronomy.
Index Terms--Genre/Form:
554714
Electronic books.
Characterizing the Nitrogen Benefit of Alfalfa in California.
LDR
:02934ntm a2200349Ki 4500
001
916805
005
20180928111501.5
006
m o u
007
cr mn||||a|a||
008
190606s2017 xx obm 000 0 eng d
020
$a
9780355451771
035
$a
(MiAaPQ)AAI10623729
035
$a
(MiAaPQ)ucdavis:17323
035
$a
AAI10623729
040
$a
MiAaPQ
$b
eng
$c
MiAaPQ
$d
NTU
100
1
$a
Lin, Eric Fleming.
$3
1190644
245
1 0
$a
Characterizing the Nitrogen Benefit of Alfalfa in California.
264
0
$c
2017
300
$a
1 online resource (88 pages)
336
$a
text
$b
txt
$2
rdacontent
337
$a
computer
$b
c
$2
rdamedia
338
$a
online resource
$b
cr
$2
rdacarrier
500
$a
Source: Masters Abstracts International, Volume: 57-01.
500
$a
Adviser: Daniel H. Putnam.
502
$a
Thesis (M.S.)--University of California, Davis, 2017.
504
$a
Includes bibliographical references
520
$a
Alfalfa in high-yielding environments fixes significant amounts of atmospheric N?, a portion of which benefits succeeding non-legume crops and reduces fertilizer N requirements by an amount sometimes termed the "legume N benefit." Field research-based estimates of the N benefit in California and other irrigated, semi-arid or arid environments are sparse, with most previous work having been conducted in predominantly rainfed, humid systems. Differences in crop management and growing environment between cropping systems could mean that nitrogen benefits in California and similar environments are different from nitrogen benefits in predominantly rainfed cropping systems. We conducted replicated plot experiments at three field station sites in California using wheat as an indicator crop to assess alfalfa's N contribution to a subsequent crop. The wheat was grown with N rates ranging from 0 to 280 kg N ha -1 after (1) continuous alfalfa ('Following Alfalfa') or (2) sudangrass-wheat ('Following Grains'). Plants were assessed for biomass production, nitrogen uptake, and grain protein content. A growth benefit was observed for plants in the 'Following Alfalfa' treatment for all growth metrics, and wheat in both rotation treatments took up the same amount of nitrogen when supplied with 280 kg N ha -1. Alfalfa's rotational N benefit likely accounted for most of its rotation benefit to wheat, and at one location this benefit was enough that N fertilization had no effect on aboveground biomass. Based on biomass production and nitrogen uptake data, we calculated a nitrogen benefit of between 102 and 114 kg N ha?¹ for wheat following a healthy alfalfa stand in an irrigated semi-arid environment.
533
$a
Electronic reproduction.
$b
Ann Arbor, Mich. :
$c
ProQuest,
$d
2018
538
$a
Mode of access: World Wide Web
650
4
$a
Agronomy.
$3
1027735
650
4
$a
Agriculture.
$3
660421
650
4
$a
Plant sciences.
$3
1179743
655
7
$a
Electronic books.
$2
local
$3
554714
690
$a
0285
690
$a
0473
690
$a
0479
710
2
$a
ProQuest Information and Learning Co.
$3
1178819
710
2
$a
University of California, Davis.
$b
Horticulture and Agronomy.
$3
1190616
773
0
$t
Masters Abstracts International
$g
57-01(E).
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10623729
$z
click for full text (PQDT)
筆 0 讀者評論
多媒體
評論
新增評論
分享你的心得
Export
取書館別
處理中
...
變更密碼[密碼必須為2種組合(英文和數字)及長度為10碼以上]
登入