語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Potassium fertilization influence on...
~
Maschmann, Elliot T.
FindBook
Google Book
Amazon
博客來
Potassium fertilization influence on rice growth, yield and stem rot index.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Potassium fertilization influence on rice growth, yield and stem rot index./
作者:
Maschmann, Elliot T.
面頁冊數:
93 p.
附註:
Source: Masters Abstracts International, Volume: 47-06, page: 3334.
Contained By:
Masters Abstracts International47-06.
標題:
Agriculture, Agronomy. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1466624
ISBN:
9781109191349
Potassium fertilization influence on rice growth, yield and stem rot index.
Maschmann, Elliot T.
Potassium fertilization influence on rice growth, yield and stem rot index.
- 93 p.
Source: Masters Abstracts International, Volume: 47-06, page: 3334.
Thesis (M.S.)--University of Arkansas, 2009.
Plant K nutrition is known to influence disease severity and crop yield. Potassium fertilization practices should be used as a cultural management tool to reduce disease severity. Stem rot (Sclerotium oryzae. Catt.) severity of rice (Oryza sativa L.) has been linked to inadequate K nutrition. Our objectives were to determine how grain yield and stem rot index (SRI) of rice grown on soils low in K were affected by (1) K application time and azoxystrobin fungicide and (2) long-term K fertilization rate. Potassium fertilizer was applied at 0, 56, and 112 kg K ha-1 to rice at preflood (PF), panicle differentiation (PD), or the late-boot (LB) stage. Azoxystrobin was applied at 0 and 0.23 kg ha-1 following the PD K application in six trials. Stem rot was assessed at maturity and expressed as SRI. The effects of long-term K fertilization were evaluated in soil that was cropped and fertilized with 0, 37, 74, 111 and 148 kg K ha -1 yr-1 for at least 5 yr before the stem rot was evaluated. Potassium fertilization increased grain yield by 8 to 11% above rice receiving no K. Within each K application time, grain yield of rice receiving 0.23 kg ha-1 azoxystrobin was 6 to 12% greater than rice receiving no azoxystrobin. Within each azoxystrobin rate, rice yields were lowest when no K was applied, intermediate when K was applied at LB, and greatest when K was applied PF or PD. The average SRI was reduced by K fertilization and azoxystrobin application. The long-term K fertilization trial showed rice grain yields were increased 19 to 73% with the greatest numerical yields always produced by the highest annual K rate. Rice receiving no K had maximum SRI values of 2.8 to 3.7, which indicate mild to moderate stem rot. Compared to rice receiving no K, applying 74 to 111 kg K ha -1 yr-1 always decreased SRI. Potassium fertilizer applied between PD and LB can reduce yield losses from K deficiency, but sufficient K fertilizer should be applied preplant or preflood to prevent yield loss from K-deficiency and minimize stem rot disease.
ISBN: 9781109191349Subjects--Topical Terms:
1018679
Agriculture, Agronomy.
Potassium fertilization influence on rice growth, yield and stem rot index.
LDR
:02824nam 2200253 4500
001
1398071
005
20110907152322.5
008
130515s2009 ||||||||||||||||| ||eng d
020
$a
9781109191349
035
$a
(UMI)AAI1466624
035
$a
AAI1466624
040
$a
UMI
$c
UMI
100
1
$a
Maschmann, Elliot T.
$3
1676942
245
1 0
$a
Potassium fertilization influence on rice growth, yield and stem rot index.
300
$a
93 p.
500
$a
Source: Masters Abstracts International, Volume: 47-06, page: 3334.
502
$a
Thesis (M.S.)--University of Arkansas, 2009.
520
$a
Plant K nutrition is known to influence disease severity and crop yield. Potassium fertilization practices should be used as a cultural management tool to reduce disease severity. Stem rot (Sclerotium oryzae. Catt.) severity of rice (Oryza sativa L.) has been linked to inadequate K nutrition. Our objectives were to determine how grain yield and stem rot index (SRI) of rice grown on soils low in K were affected by (1) K application time and azoxystrobin fungicide and (2) long-term K fertilization rate. Potassium fertilizer was applied at 0, 56, and 112 kg K ha-1 to rice at preflood (PF), panicle differentiation (PD), or the late-boot (LB) stage. Azoxystrobin was applied at 0 and 0.23 kg ha-1 following the PD K application in six trials. Stem rot was assessed at maturity and expressed as SRI. The effects of long-term K fertilization were evaluated in soil that was cropped and fertilized with 0, 37, 74, 111 and 148 kg K ha -1 yr-1 for at least 5 yr before the stem rot was evaluated. Potassium fertilization increased grain yield by 8 to 11% above rice receiving no K. Within each K application time, grain yield of rice receiving 0.23 kg ha-1 azoxystrobin was 6 to 12% greater than rice receiving no azoxystrobin. Within each azoxystrobin rate, rice yields were lowest when no K was applied, intermediate when K was applied at LB, and greatest when K was applied PF or PD. The average SRI was reduced by K fertilization and azoxystrobin application. The long-term K fertilization trial showed rice grain yields were increased 19 to 73% with the greatest numerical yields always produced by the highest annual K rate. Rice receiving no K had maximum SRI values of 2.8 to 3.7, which indicate mild to moderate stem rot. Compared to rice receiving no K, applying 74 to 111 kg K ha -1 yr-1 always decreased SRI. Potassium fertilizer applied between PD and LB can reduce yield losses from K deficiency, but sufficient K fertilizer should be applied preplant or preflood to prevent yield loss from K-deficiency and minimize stem rot disease.
590
$a
School code: 0011.
650
4
$a
Agriculture, Agronomy.
$3
1018679
650
4
$a
Agriculture, Soil Science.
$3
1017824
690
$a
0285
690
$a
0481
710
2
$a
University of Arkansas.
$3
1017562
773
0
$t
Masters Abstracts International
$g
47-06.
790
$a
0011
791
$a
M.S.
792
$a
2009
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1466624
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9161210
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入