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Effects of gypsum, compost and cover...

LaCorbiniere-JnBaptiste, Marcia.

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Effects of gypsum, compost and cover crops on soil nutrient availability, corn yield and quality and soil quality.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Effects of gypsum, compost and cover crops on soil nutrient availability, corn yield and quality and soil quality./
作者:	LaCorbiniere-JnBaptiste, Marcia.
面頁冊數:	160 p.
附註:	Source: Dissertation Abstracts International, Volume: 70-10, Section: B, page: 5917.
Contained By:	Dissertation Abstracts International70-10B.
標題:	Agriculture, Agronomy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3381278
ISBN:	9781109415827

Effects of gypsum, compost and cover crops on soil nutrient availability, corn yield and quality and soil quality.
LaCorbiniere-JnBaptiste, Marcia.

Effects of gypsum, compost and cover crops on soil nutrient availability, corn yield and quality and soil quality. - 160 p.

Source: Dissertation Abstracts International, Volume: 70-10, Section: B, page: 5917.

Thesis (Ph.D.)--Michigan State University, 2009.

The recent and growing interest in the use of gypsum (CaSO4·2H 2O) by Michigan farmers, and the lack of documentation on the effect of gypsum on Michigan soils, warrant investigation on its effect on various soil and plant growth parameters. This study investigated the effects of gypsum and its interaction with compost and cover crops on soil nutrient availability, yield and quality of sweet corn (Zea mays var. rugosa ), and soil quality. The objective was to study the effects of gypsum alone, or combined with compost and cover crops on (1) extractable Ca and Mg, (2) sweet corn growth, yield and quality, and (3) soil quality. The treatment design involved three factors: gypsum application at 0 and 2.24 Mg ha -1, poultry compost at 0 and 2.7 Mg ha-1, and four cover crops, plus a no cover treatment. The four cover crops were oilseed radish (Raphanus sativus), oriental mustard (Brassica juncea L,), red clover (Trifolium pratense), and cereal rye (Secale cereale), or wheat (Triticum aestivum ) and no cover. Corn was sown in the spring of each year and cover crops were sown in the spring of 2005 and both spring and fall of 2006. An early cover crop treatment was planted in early spring and a late cover treatment planted after sweet corn was harvested in the fall of 2006. The statistical model included the three factors and all interactions among them as fixed effects and replication as a random effect. Gypsum had minimal (positive) effect on extractable Ca in spring of 2007 but had a negative effect on extractable Mg in 2006 and 2007 (both spring and fall). Compost application increased Ca by up to 44% and resulted in significant transfer of extractable Mg to lower depths. Our results suggest that sweet corn has a higher demand for both Ca and Mg than the cover crops studied and that sweet corn requirement of Ca may be genetically/variety dependent. Cover crops may have potential to increase availability of both Ca and Mg (alpha = 0.05) to soil. Gypsum application decreased both corn plant biomass at the V8 (8-leaf stage) growth stage and corn yield; had no effect on number of corn ears, and no combined treatment effect on number of corn ears per hectare. Cover crops affected the number of sweet corn ears only in 2006 (alpha = 0.05). Both cover crops and compost had a positive effect on sweet corn growth, yield and quality. Gypsum had no effect on the quality components investigated. Compost application significantly enhanced aggregate stability and reduced bulk density over the three years of study. This increase corresponded with the active organic matter (AOM) test which showed a fair rating of soil quality compared to the non compost treatment. Generally there was no effect (alpha = 0.05) of cover crops on the soil quality components studied. Mustard negatively influenced water stable aggregate (WSA), bulk density and nematode population. This study may have economic implications to Michigan and other farmers.

ISBN: 9781109415827Subjects--Topical Terms:

1018679
Agriculture, Agronomy.

Effects of gypsum, compost and cover crops on soil nutrient availability, corn yield and quality and soil quality.
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520 $a The recent and growing interest in the use of gypsum (CaSO4·2H 2O) by Michigan farmers, and the lack of documentation on the effect of gypsum on Michigan soils, warrant investigation on its effect on various soil and plant growth parameters. This study investigated the effects of gypsum and its interaction with compost and cover crops on soil nutrient availability, yield and quality of sweet corn (Zea mays var. rugosa ), and soil quality. The objective was to study the effects of gypsum alone, or combined with compost and cover crops on (1) extractable Ca and Mg, (2) sweet corn growth, yield and quality, and (3) soil quality. The treatment design involved three factors: gypsum application at 0 and 2.24 Mg ha -1, poultry compost at 0 and 2.7 Mg ha-1, and four cover crops, plus a no cover treatment. The four cover crops were oilseed radish (Raphanus sativus), oriental mustard (Brassica juncea L,), red clover (Trifolium pratense), and cereal rye (Secale cereale), or wheat (Triticum aestivum ) and no cover. Corn was sown in the spring of each year and cover crops were sown in the spring of 2005 and both spring and fall of 2006. An early cover crop treatment was planted in early spring and a late cover treatment planted after sweet corn was harvested in the fall of 2006. The statistical model included the three factors and all interactions among them as fixed effects and replication as a random effect. Gypsum had minimal (positive) effect on extractable Ca in spring of 2007 but had a negative effect on extractable Mg in 2006 and 2007 (both spring and fall). Compost application increased Ca by up to 44% and resulted in significant transfer of extractable Mg to lower depths. Our results suggest that sweet corn has a higher demand for both Ca and Mg than the cover crops studied and that sweet corn requirement of Ca may be genetically/variety dependent. Cover crops may have potential to increase availability of both Ca and Mg (alpha = 0.05) to soil. Gypsum application decreased both corn plant biomass at the V8 (8-leaf stage) growth stage and corn yield; had no effect on number of corn ears, and no combined treatment effect on number of corn ears per hectare. Cover crops affected the number of sweet corn ears only in 2006 (alpha = 0.05). Both cover crops and compost had a positive effect on sweet corn growth, yield and quality. Gypsum had no effect on the quality components investigated. Compost application significantly enhanced aggregate stability and reduced bulk density over the three years of study. This increase corresponded with the active organic matter (AOM) test which showed a fair rating of soil quality compared to the non compost treatment. Generally there was no effect (alpha = 0.05) of cover crops on the soil quality components studied. Mustard negatively influenced water stable aggregate (WSA), bulk density and nematode population. This study may have economic implications to Michigan and other farmers.
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