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Midseason Application of Organic Fer...

Murray, Anna Corinna.

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Midseason Application of Organic Fertilizer Improves Yield and N Uptake in Rice: An Experimental Field Study.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Midseason Application of Organic Fertilizer Improves Yield and N Uptake in Rice: An Experimental Field Study./
作者:	Murray, Anna Corinna.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	38 p.
附註:	Source: Masters Abstracts International, Volume: 81-04.
Contained By:	Masters Abstracts International81-04.
標題:	Agronomy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13897076
ISBN:	9781085799577

Midseason Application of Organic Fertilizer Improves Yield and N Uptake in Rice: An Experimental Field Study.
Murray, Anna Corinna.

Midseason Application of Organic Fertilizer Improves Yield and N Uptake in Rice: An Experimental Field Study. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 38 p.

Source: Masters Abstracts International, Volume: 81-04.

Thesis (M.S.)--University of California, Davis, 2019.

This item must not be sold to any third party vendors.

Organic rice (Oryza sativa L.) systems in California utilize a unique strategy for weed control that can complicate nitrogen (N) dynamics and management. A 30 day drain approximately one month into the growing season is employed to control weeds but increases the potential for N losses and can reduce yields. Two field trials were initiated on commercial organic rice fields to evaluate the effects of top-dressing fertilizer N following the drain period on N uptake and yields. Treatments evaluated rates and sources of commercially available organic fertilizers varying in N content. The six treatments were a control with no top-dress fertilizer, and top-dress applications of 12-3-0 (applied at 22, 45 and 67 kg N ha-1) and 6-3-2 and 4-1-4 applied at 45 kg N ha-1. Total plant N uptake at harvest increased linearly with increasing N rate at both locations. Grain yields increased linearly at both sites with increasing application rates up to 45 kg N ha-1 above which yields plateaued at one site but continued to increase linearly at the other site. Comparing the three fertilizer sources at the 45 kg N ha-1 rate, application of 12-3-0, which had a lower C:N ratio, resulted in higher yields and N recovery efficiency than the other fertilizers; although not significantly different. Despite the higher cost of 12-3-0, the higher yield made it a more economical option in these studies.

ISBN: 9781085799577Subjects--Topical Terms:

2122783
Agronomy.
Subjects--Index Terms:

Fertilizer

Midseason Application of Organic Fertilizer Improves Yield and N Uptake in Rice: An Experimental Field Study.
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506 $a This item must not be sold to any third party vendors.
520 $a Organic rice (Oryza sativa L.) systems in California utilize a unique strategy for weed control that can complicate nitrogen (N) dynamics and management. A 30 day drain approximately one month into the growing season is employed to control weeds but increases the potential for N losses and can reduce yields. Two field trials were initiated on commercial organic rice fields to evaluate the effects of top-dressing fertilizer N following the drain period on N uptake and yields. Treatments evaluated rates and sources of commercially available organic fertilizers varying in N content. The six treatments were a control with no top-dress fertilizer, and top-dress applications of 12-3-0 (applied at 22, 45 and 67 kg N ha-1) and 6-3-2 and 4-1-4 applied at 45 kg N ha-1. Total plant N uptake at harvest increased linearly with increasing N rate at both locations. Grain yields increased linearly at both sites with increasing application rates up to 45 kg N ha-1 above which yields plateaued at one site but continued to increase linearly at the other site. Comparing the three fertilizer sources at the 45 kg N ha-1 rate, application of 12-3-0, which had a lower C:N ratio, resulted in higher yields and N recovery efficiency than the other fertilizers; although not significantly different. Despite the higher cost of 12-3-0, the higher yield made it a more economical option in these studies.
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