Abstract
Abstract A field experiment was carried out in central-eastern Poland (52°06’N, 22°55’E) to investigate the effect of a sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth. The ‘Challenger F 1 ’ and ‘Sweet Wonder F 1 ’ corn cultivars were cultivated in the first year following organic fertilization. Sunflower was plowed in the third week of October. The effect of the catch crop’s green manure was compared to farmyard manure applied at a dose of 40 t ha -1 as well as a control without organic manuring. The biomass quantity and the amount of macroelements absorbed with the sunflower catch crop sown on the 21 st of July was similar to the quantity absorbed with farmyard manure applied at a rate of 40 t ha -1 . The quantity of organic mass and macroelements absorbed with the sunflower sown on the 4 th of August was smaller by 20%, and by 50% for the 18 th of August set, compared with the corn treated with farmyard manure. The effects of farmyard manure and sunflower catch crop sown on the 21 st of July on the yield were similar. The marketable yield of cobs of corn plants cultivated following farmyard manure treatment and catch crop sown on the 21 st of July amounted to 12.6 and 12.4 t ha -1 , respectively. An application of sunflower sown as a green manure on the 2 nd and 3 rd date prior to corn cultivation decreased marketable cob yields by 8% and 25% as compared to the farmyard manure. The corn cobs cultivated following the sunflower sown on the 21 st of July and treated with farmyard manure had the greatest mass. The corn cobs cultivated with farmyard manure were characterized by the highest biological productivity (72.1%); similar was the cob production of corn cultivated with catch crops sown on the 21 st of July and the 4 th of August. The ‘Challenger F 1 ’ and ‘Sweet Wonder F 1 ’ yields were similar. ‘Challenger F 1 ’ produced cobs with higher mass whereas ‘Sweet Wonder F 1 ’ produced cobs characterized by greater biological productivity.
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Claims 13
Claim · model-written summary
Sunflower catch crop sown on 21 July absorbed biomass and macroelements similar to farmyard manure at 40 t/ha.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The biomass quantity and the amount of macroelements absorbed with the sunflower catch crop sown on the 21 st of July was similar to the quantity absorbed with farmyard manure applied at a rate of 40 t ha -1”
Claim · model-written summary
Sunflower sown on 4 August gave 20% smaller organic mass and macroelement uptake than farmyard manure.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The quantity of organic mass and macroelements absorbed with the sunflower sown on the 4 th of August was smaller by 20%, and by 50% for the 18 th of August set, compared with the corn treated with farmyard manure”
Claim · model-written summary
Sunflower sown on 18 August gave 50% smaller organic mass and macroelement uptake than farmyard manure.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The quantity of organic mass and macroelements absorbed with the sunflower sown on the 4 th of August was smaller by 20%, and by 50% for the 18 th of August set, compared with the corn treated with farmyard manure”
Claim · model-written summary
Sunflower catch crop sown on 21 July had a yield similar to farmyard manure in sweet corn.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The effects of farmyard manure and sunflower catch crop sown on the 21 st of July on the yield were similar”
Claim · model-written summary
Marketable cob yield was 12.6 and 12.4 t/ha for farmyard manure and the 21 July catch crop, respectively.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The marketable yield of cobs of corn plants cultivated following farmyard manure treatment and catch crop sown on the 21 st of July amounted to 12.6 and 12.4 t ha -1 , respectively”
Claim · model-written summary
Sunflower sown as green manure on the 2nd date decreased marketable cob yield by 8% compared with farmyard manure.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“An application of sunflower sown as a green manure on the 2 nd and 3 rd date prior to corn cultivation decreased marketable cob yields by 8% and 25% as compared to the farmyard manure”
Claim · model-written summary
Sunflower sown as green manure on the 3rd date decreased marketable cob yield by 25% compared with farmyard manure.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“An application of sunflower sown as a green manure on the 2 nd and 3 rd date prior to corn cultivation decreased marketable cob yields by 8% and 25% as compared to the farmyard manure”
Claim · model-written summary
Corn cobs after sunflower sown on 21 July with farmyard manure had the greatest mass.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The corn cobs cultivated following the sunflower sown on the 21 st of July and treated with farmyard manure had the greatest mass”
Claim · model-written summary
Corn cultivated with farmyard manure had the highest biological productivity (72.1%).
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The corn cobs cultivated with farmyard manure were characterized by the highest biological productivity (72.1%); similar was the cob production of corn cultivated with catch crops sown on the 21 st of July and the 4 th of August”
Claim · model-written summary
Cob production was similar for catch crops sown on 21 July and 4 August.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The corn cobs cultivated with farmyard manure were characterized by the highest biological productivity (72.1%); similar was the cob production of corn cultivated with catch crops sown on the 21 st of July and the 4 th of August”
Claim · model-written summary
Challenger F 1 and Sweet Wonder F 1 had similar yields.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“The ‘Challenger F 1 ’ and ‘Sweet Wonder F 1 ’ yields were similar”
Claim · model-written summary
Challenger F 1 produced cobs with higher mass than Sweet Wonder F 1.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“‘Challenger F 1 ’ produced cobs with higher mass whereas ‘Sweet Wonder F 1 ’ produced cobs characterized by greater biological productivity”
Claim · model-written summary
Sweet Wonder F 1 produced cobs with greater biological productivity than Challenger F 1.
Verbatim
e0“sunflower catch crop used as green manure sown on three different dates (21 st July, 4 th and 18 th August) on sweet corn yield and growth”
e1“‘Challenger F 1 ’ produced cobs with higher mass whereas ‘Sweet Wonder F 1 ’ produced cobs characterized by greater biological productivity”
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