| 黄土塬区春玉米氮肥 - 水分 - 产量关系研究 |
| 杨忠浩1; 党廷辉1,2; 路远1; 吴三鼎2,3; 郑利芳2,3
|
| 2020
|
发表期刊 | 水土保持学报
|
卷号 | 34期号:4页码:237-248 |
摘要 | 土壤水分是制约我国西北干旱半干旱地区农业发展的重要因素,探寻科学合理的氮肥—水分—产量
关系,对于促进区域农业持续发展有重要的理论与实践意义。在陕西省长武县的中国科学院长武黄土高
原农业生态试验站进行氮肥递减试验,在传统施氮250kg / hm
2 (
N6 )的基础上,依次递减20%
,设置 CK
、
N1 、 N2 、 N3 、 N4 、 N5 、 N6 7个处理。结果表明:( 1 )春玉米生育期土壤耗水量随氮肥施用量的增加而增加,
土壤水分亏缺主要发生在 80cm 以下土层,且水分亏缺程度随施氮量增加而加重。( 2 )春玉米产量和水分
利用率均随氮肥用量的增加呈现二次抛物线趋势变化。春玉米传统施氮量( N6 ,
250kg / hm
2 )已严重过量,
减氮 20% ( N5 ,施氮量 200kg / hm
2 )可以取得较高的产量和水分利用率。 2 年 N5 籽粒产量较 N6 分别增加
9. 6%和5. 8% ,水分利用率提高14. 5%和9. 1% 。因此,建议把减氮20% ( N5
,即200kg
/ hm
2 施氮量)作为
试验区推荐施氮量。 |
其他摘要 | Soil moisture is an important factor restricting agricultural development in arid and semi - arid
regions of northwest China.It is of great theoretical and practical significance to explore a scientific and
reasonable relationship between nitrogen fertilizer
, water and yield for promoting the sustainable development of
regional agriculture.At the Changwu Loess Plateau Agro - ecological Experiment Station of the Chinese
Academy of Sciences in Changwu County
, Shaanxi Province , a nitrogen fertilizer decline test was performed.
Based on the traditional nitrogen application of 250kg
/ hm
2 (
N6 ), it was reduced by 20%in order.Set CK ,
N1 , N2 , N3 , N4 , N5 , N6seven processes.The results showed that :( 1 ) The soil water consumption during
the growth period of spring corn increases with the increase of nitrogen fertilizer application.The soil water
deficit mainly occurs below 80cm of soil layer
, and the degree of water deficiency
increases with the increase
of nitrogen fertilizer application. ( 2 ) Both the yield and water use efficiency of spring corn showed a second
parabolic trend with the increase of nitrogen fertilizer use.The traditional nitrogen application rate of spring
corn ( N6 , 250kg / hm
2 )
has been severely excessive , and a reduction of 20%
( N5 , nitrogen application rate
of 200kg
/ hm
2 )
can achieve higher yield and water use efficiency.Compared with N6 , N5grain output
increased by 9.6% and 5.8% , and water use efficiency
increased by 14.5% and 9.1%.Therefore
, it is
recommended to reduce nitrogen by 20%
( N5 , 200kg / hm
2
nitrogen application rate ) as the recommended
nitrogen application rate. |
关键词 | 黄土高原
春玉米
施氮量
产量
水分利用
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
|
文献类型 | 期刊论文
|
条目标识符 | sbir.nwafu.edu.cn/handle/361005/10022
|
专题 | 水保所知识产出(1956---)
|
作者单位 | 1.西北农林科技大学资源环境学院 2.中国科学院水利部水土保持研究所 3.中国科学院大学
|
推荐引用方式 GB/T 7714 |
杨忠浩,党廷辉,路远,等. 黄土塬区春玉米氮肥 - 水分 - 产量关系研究[J]. 水土保持学报,2020,34(4):237-248.
|
APA |
杨忠浩,党廷辉,路远,吴三鼎,&郑利芳.(2020).黄土塬区春玉米氮肥 - 水分 - 产量关系研究.水土保持学报,34(4),237-248.
|
MLA |
杨忠浩,et al."黄土塬区春玉米氮肥 - 水分 - 产量关系研究".水土保持学报 34.4(2020):237-248.
|
文件名:
|
黄土塬区春玉米氮肥_水分_产量关系研究_杨忠浩.pdf
|
格式:
|
Adobe PDF
|
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