Determining optimal water and nitrogen management under different initial soil mineral nitrogen levels in northwest China based on a model approach

Three experiments, begun in successive years, were conducted between 1974 and 1979 in north-eastern Victoria to investigate the effects of rotating wheat (cv. Olympic) and 'sweet' lupins (Lupinus angustifolius cv. Uniharvest) on crop yields, soil fertility and crop diseases. The grain yield of continuous wheat was 2.58 t/ha and of continuous lupins 0.66 t/ha (P<0.05). Wheat, grown after a lupin crop, yielded 750 kg/ha more than wheat after wheat, and a second wheat crop, after lupins, yielded 420 kg/ha more than a third successive wheat crop. Lupins, grown after wheat, yielded 50-165% more than lupins after lupins. Grain nitrogen of wheat was significantly increased after lupins (P<0.01). Differences in soil mineral nitrogen were apparent ten weeks after sowing, with mean nitrogen levels of 37 and 55 kg/ha under wheat and lupins, respectively. Soil mineral nitrogen (0-20 cm) was consistently greater after lupins than after wheat (P<0.01) when measured just before seeding the succeeding crop. Overall, mean accretion of mineral nitrogen under lupins was 4 1 kg/ha.year. Residual nitrogen from lupins, after one succeeding wheat crop had been grown, was also evident (mean 23 kg/ha). Crop rotation influenced the incidence of crop diseases in wheat and lupins. Lupins after lupins suffered severely from brown leaf spot (Pleiochaeta setosa), up to 63% of plants being infected compared with only 18% after wheat. Disease incidence (mainly Gaeumannomyces graminis) in wheat increased from less than 1% in the first year of cropping, to 36% infection in year 3. When wheat was grown after lupins, disease incidence was negligible.

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Nitrogen management effects on soil mineral nitrogen, plant nutrition and yield of super early cycle common bean genotypes

Acta Scientiarum Agronomy ◽

10.4025/actasciagron.v39i3.32781 ◽

2017 ◽

Vol 39 (3) ◽

pp. 369 ◽

Cited By ~ 2

Author(s):

Adriano Stephan Nascente ◽

Maria da Conceição Santana Carvalho ◽

Leonardo Cunha Melo ◽

Paulo Holanda Rosa

Keyword(s):

Common Bean ◽

Plant Nutrition ◽

Nitrogen Management ◽

Mineral Nitrogen ◽

Soil Mineral ◽

Soil Mineral Nitrogen ◽

Nitrogen Plant ◽

Management Effects

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Interpretation of soil mineral nitrogen by scoring organic matter and nitrogen management as an “N-score” in the fields of Hokkaido before sugar beet planting

Soil Science & Plant Nutrition ◽

10.1111/j.1747-0765.2010.00509.x ◽

2010 ◽

Vol 56 (5) ◽

pp. 750-759 ◽

Cited By ~ 3

Author(s):

Nobuhiko FUEKI ◽

Koji SATO ◽

Satoshi NAKATSU

Keyword(s):

Organic Matter ◽

Sugar Beet ◽

Nitrogen Management ◽

Mineral Nitrogen ◽

Soil Mineral ◽

Soil Mineral Nitrogen

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Influence of root zone nitrogen management and a summer catch crop on cucumber yield and soil mineral nitrogen dynamics in intensive production systems

Plant and Soil ◽

10.1007/s11104-008-9679-0 ◽

2008 ◽

Vol 313 (1-2) ◽

pp. 55-70 ◽

Cited By ~ 39

Author(s):

Ruiying Guo ◽

Xiaolin Li ◽

Peter Christie ◽

Qing Chen ◽

Rongfeng Jiang ◽

...

Keyword(s):

Production Systems ◽

Root Zone ◽

Nitrogen Dynamics ◽

Nitrogen Management ◽

Mineral Nitrogen ◽

Catch Crop ◽

Soil Mineral ◽

Soil Mineral Nitrogen ◽

Summer Catch Crop ◽

Cucumber Yield

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Comparative effects of black and green gram (mung beans) and grain sorghum on soil mineral nitrogen and subsequent grain sorghum yields on the Eastern Darling Downs

Australian Journal of Experimental Agriculture ◽

10.1071/ea9840244 ◽

1984 ◽

Vol 24 (125) ◽

pp. 244 ◽

Cited By ~ 25

Author(s):

JA Doughton ◽

J Mackenzie

Keyword(s):

Fertilizer Application ◽

Grain Sorghum ◽

Mineral Nitrogen ◽

Green Gram ◽

Black Gram ◽

Soil Mineral ◽

Soil Mineral Nitrogen ◽

Nitrogen Levels ◽

Sorghum Grain ◽

Summer Fallow

A field trial was carried out on a black earth (Waco series) at Cambooya on the Eastern Darling Downs to compare the effect of black gram, green gram, grain sorghum and a summer fallow on soil mineral nitrogen (NO3-N + NH4-N) and the yield of grain sorghum grown in the following summer. The initial sorghum treatment severely depleted soil mineral nitrogen to 120 cm; even after a 173-d fallow, there was still 34 kg/ha less nitrogen present than initially in this treatment. Black and green gram also reduced levels of soil mineral nitrogen during crop growth, but these recovered to exceed pre-trial levels by 29 and 42 kg N/ha, respectively, after a winter fallow. The fallow treatment accumulated 100 kg N/ha of mineral nitrogen between January and October, but mineralization was markedly reduced from August to October. Sorghum grown on all plots in the second summer responded markedly to prior treatments, and grain yields and responses to nitrogen applied at 0, 34 and 68 kg N/ha reflected mineral nitrogen levels at planting. Yields of sorghum grain obtained without fertilizer after black gram, green gram and fallow were 8333, 7477 and 9663 kg/ha, respectively, compared with 4658 kg/ha after sorghum. Prior crops of both grams increased sorghum yield as much as a fertilizer application of 68 kg N/ha.

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