Crops ›› 2016, Vol. 32 ›› Issue (5): 124-130.doi: 10.16035/j.issn.1001-7283.2016.05.021

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Effects of Nitrogen Application and Planting Density on Fertilizer Use Efficiency of Late Rice Fengyuanyou 299 under the Condition of Water Saving Irrigation

Long Wenfei,Fu Zhiqiang,Li Hailin   

  1. College of Agronomy,Hunan Agricultural University/Collaborative Innovation Center of Paddy Crop and Oil Crops in Southern,Changsha 410128,Hunan,China
  • Received:2016-06-12 Revised:2016-08-04 Online:2016-10-15 Published:2018-08-26
  • Contact: Zhiqiang Fu

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Abstract:

For building high yield and high efficiency water saving planting technology model of rice, field plot test was used to study the effect of nitrogen application and planting density under the condition of water saving irrigation on the fertilizer utilization ratio of double season late rice Fengyuanyou 299. Results indicated that amount of nitrogen application, planting density and interaction effects of nitrogen and density had great significant effects on N P K absorption and fertilizer utilization ratio. With the amount of nitrogen increasing, rice plant uptake of phosphorus and nitrogen showed a trend of firstly increase and then decrease, and potassium uptake showed an increase after the first decrease and then increase trend. As the density increases, plant total nitrogen absorption and potassium absorption showed a trend of firstly decrease and then increase, total phosphorus absorption showed a gradual increasing trend. Fertilizer contribution rate of low nitrogen fertilizer, nitrogen dependency rate in soil, nitrogen agronomic efficiency and N fertilizer partial productivity maximum, significantly higher than the medium nitrogen treatment; generally high-density processing more conducive to utilization and absorption of nitrogen fertilizer and improve the contribution rates of nitrogen fertilizer. Rice economic yield had significantly positive correlation (P<0.01) with the N P K absorption of stem and leaf and the nitrogen fertilizer contribution rate. Therefore, a reasonable amount of nitrogen application and planting density (N1T3) in rice can form a high yield and high efficiency group structure effectively, improve fertilizer utilization ratio, and improve the efficiency of rice production.

Key words: Rice, Water-saving irrigation, Interactive of fertilizer and density, Fertilizer utilization ratio

Table 1

Comparison of nitrogen absorption kg/hm2"

处理
Treatments		 茎鞘吸氮量
Stem-sheath N uptake		 叶吸氮量
Leaf N uptake		 穗吸氮量
Spike N uptake		 总吸氮量
Total N uptake
N0 T1 7.9iH 10.8hG 78.4cCD 97.1eD
T2 4.2jI 8.7iH 40.9hG 53.8gF
T3 11.1hG 11.3ghG 57.6gF 80.0fE
N1 T1 22.6fE 12.5gG 91.7bB 126.8bB
T2 22.6fE 21.0fF 67.7deE 111.3dC
T3 19.9gF 33.1abAB 59.1fgF 112.1dC
N2 T1 28.1cD 30.5cC 102.6aA 161.2aA
T2 26.0dD 21.0fF 72.2dDE 119.2cBC
T3 24.7eD 34.3aA 97.4abAB 156.4aA
N3 T1 28.9cC 28.2dD 64.5efEF 121.6bcB
T2 30.9bB 25.2eE 44.2hG 100.3eD
T3 46.2aA 32.0bcBC 83.6cC 161.8aA
F值F-values N 1 671.7** 1 293.8** 223.2** 629.7**
T 288.6** 267.8** 179.3** 327.2**
N×T 348.3** 84.8** 35.4** 66.0**
与产量相关性Correlation coefficient with yield 0.80** 0.80** 0.31 0.70**

Table 2

Comparison of phosphorus absorption kg/hm2"

处理
Treatments		 茎鞘吸磷量
Stem-sheath P uptake		 叶吸磷量
Leaf P uptake		 穗吸磷量
Spike P uptake		 总吸磷量
Total P uptake
N0 T1 1.3fDE 0.8cC 15.9cC 18.1dD
T2 1.0fE 0.5dC 11.1eEF 12.6eE
T3 1.9eD 0.7cdC 9.8fF 12.5eE
N1 T1 3.5cC 0.8cC 12.6dDE 16.9dD
T2 3.1cdC 1.4bB 23.6aA 28.0aA
T3 3.1cdC 1.9aA 13.0dD 18.1dD
N2 T1 3.3cdC 2.0aA 12.6dDE 17.8dD
T2 3.3cdC 1.4bB 17.5bBC 22.1cC
T3 2.9dC 2.1aA 17.9bB 22.9cC
N3 T1 4.2bB 1.9aA 5.8hG 11.9eE
T2 3.2cdC 1.5bB 7.3gG 11.9eE
T3 6.5aA 2.2aA 17.4bBC 26.0bB
F值F-values N 178.5** 137.0** 136.9** 118.5**
T 46.0** 44.7** 69.5** 78.8**
N×T 34.7** 14.8** 168.8** 201.7**
与产量相关性Correlation coefficient with yield 0.75** 0.79** 0.24 0.48

Table 3

Comparison of kalium absorption kg/hm2"

处理
Treatments		 茎鞘吸钾量
Stem-sheath K uptake		 叶吸钾量
Leaf K uptake		 穗吸钾量
Spike K uptake		 总吸钾量
Total K uptake
N0 T1 31.4fE 14.3gEF 12.1bB 57.8gF
T2 18.9gF 8.0iH 6.1fG 33.0iH
T3 30.3fE 11.2hG 7.1efFG 48.6hG
N1 T1 64.3bB 12.5hFG 9.0dDE 85.8eD
T2 66.6bB 18.1eD 12.1bB 96.8cC
T3 59.3cC 30.9aA 6.5fFG 96.7cC
N2 T1 52.6dD 22.6cC 7.8eEF 83.0eD
T2 49.1eD 16.2fDE 9.9cdCD 75.2fE
T3 56.6cC 25.2bB 19.2aA 101.0bB
N3 T1 51.8deD 20.9dC 3.5gH 76.2fE
T2 66.4bB 22.4cC 4.4gH 93.3dC
T3 79.3aA 24.7bB 11.0cBC 114.9aA
F值F-values N 901.6** 237.9** 76.1** 1 238.9**
T 61.6** 265.7** 120.4** 359.6**
N×T 84.7** 123.2** 233.0** 172.1**
与产量相关性Correlation coefficient with yield 0.90** 0.76** 0.12 0.91**

Table 4

Comparison of nitrogen use efficiency"

处理
Treatments		 氮肥农学利用率
NAE(kg/kg)		 氮肥吸收利用率
NRE(%)		 氮肥生理利用率
NPE(kg/kg)		 氮肥偏生产力
NPFP(kg/kg)		 氮肥贡献率
NCR(%)		 土壤氮素依存率
SNDR(%)
N1 T1 10.6cB 14.3cdCD 50.0aA 49.9cC 21.3cABC 76.7aA
T2 11.8bAB 24.5aAB 27.7bcB 51.5bB 22.9abcABC 48.3efDE
T3 13.2aA 18.4bcBC 55.8aA 53.0aA 25.0aA 71.3bB
N2 T1 7.5defCDE 23.4abAB 21.4bcB 37.0eE 20.2cC 60.4cC
T2 8.2dCD 23.4abAB 22.6bcB 38.0dDE 21.6bcABC 45.1fE
T3 8.6dC 28.2a 20.6cB 38.4dD 22.3abcABC 51.1deD
N3 T1 6.2fE 10.3dD 59.0aA 29.8gG 20.9cBC 80.0aA
T2 6.8efDE 12.9dCD 32.6bB 30.6fgFG 22.1bcABC 53.5dD
T3 7.6deCDE 24.1aAB 21.4bcB 31.5fF 24.2abAB 49.4eDE
F值F-values N 414.0** 18.3** 54.8** 3 504.0** 7.4* 224.7**
T 11.5** 18.3** 13.4** 33.8** 8.3** 209.0**
N×T 0.9 9.5** 13.6** 2.3 0.3 34.7**
与产量相关性
Correlation coefficient with yield		 0.53
 0.29
 -0.02
 0.31
 0.99**
 -0.30
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