A comparison of organic and inorganic nitrogen fertilizers: Their nitrate-N and ammonium-N release characteristics and effects on the growth response of lettuce (Lactuca sativa L. cv. Fortune)

1989 ◽  
Vol 115 (1) ◽  
pp. 135-144 ◽  
Author(s):  
S. R. Smith ◽  
P. Hadley
Keyword(s):  
Lactuca Sativa ◽  
Growth Response ◽  
Inorganic Nitrogen ◽  
Nitrogen Fertilizers ◽  
Nitrate N ◽  
Lactuca Sativa L ◽  
Ammonium N ◽  
N Release

scholarly journals Soil inorganic nitrogen in spatially distinct areas within a commercial dairy farm in Canterbury, New Zealand

2017 ◽  
Vol 79 ◽  
pp. 83-88
Author(s):  
D.C. Ekanayake ◽  
J.L. Owens ◽  
S. Hodge ◽  
J.A.K. Trethewey ◽  
R.L. Roten ◽  
...  
Keyword(s):  
New Zealand ◽  
Surface Soil ◽  
Inorganic Nitrogen ◽  
Dairy Farm ◽  
Soil Samples ◽  
Inorganic N ◽  
N Distribution ◽  
Nitrate N ◽  
Ammonium N ◽  
Grazing Behaviour

For precision nitrogen (N) fertilisation of grazed dairy paddocks, soil N distribution needs to be quantified. It is expected that farm infrastructure will affect inorganic-N distribution due to its influence on cow grazing behaviour. Surface soil from four spatially distinct areas (main gate, water troughs, non-irrigated and the remaining pasture) was analysed for soil ammonium-N (NH4 +-N) and nitrate-N (NO3 --N) from three paddocks (180 soil samples) on an irrigated commercial dairy farm in Canterbury, New Zealand. Variation between paddocks was higher for NO3 - (P

Effect of nitrogenous fertilisers on soil inorganic nitrogen levels and uptake by wheat on very acid soils

1989 ◽  
Vol 29 (6) ◽  
pp. 837
Author(s):  
MG Mason
Keyword(s):  
Ammonium Nitrate ◽  
Ammonium Sulfate ◽  
Inorganic Nitrogen ◽  
Acid Soils ◽  
Nitrogen Levels ◽  
Nitrate N ◽  
Ammonium N ◽  
Rate Of Decline ◽  
Fertiliser Application ◽  
Plant Sampling

Urea, ammonium sulfate and ammonium nitrate were compared as sources of nitrogen (N) for wheat grown on very acid soils at 2 sites in 1980, in the absence of lime or where lime at 2 t/ha was incorporated into the top 10 cm of soil. The plots were soil sampled each week for the first 5 weeks after sowing, and further samples were collected at 9 weeks. Wheat tops were sampled 4 times during the first 6 weeks after sowing. Soils and plants were analysed for ammonium-N and nitrate-N. Application of each fertiliser initially caused increased soil levels of ammonium-N which fell with time at both sites. Increases in nitrate-N were small and were usually not significant. At 1 site (Bunketch), and with ammonium sulfate as the N source when no lime was added, there was a slower rate of decline in ammonium-N than in the presence of lime. Fertiliser type did not result in any significant differences in ammonium and N concentrations in the soil, apart from the higher levels of nitrate-N in the ammonium nitrate treatments. At both sites and particularly at Perenjori both in the absence and presence of lime, nitrate-N concentrations in plants were higher for the treatments with N fertiliser than for the unfertilised controls. This suggests that the N applied as fertiliser ammonium is nitrified before it is taken up by the plants. At the first plant sampling at Perenjori and at the first 2 samplings at Bunketch, ammonium-N levels in the fertilised plants were higher than in the unfertilised plants, suggesting that ammonium-N was readily taken up by the plants. Plant nitrate levels were lower at Bunketch in the absence of lime, than where lime was added. Grain yields were significantly increased at both sites by N fertiliser application. The 3 fertilisers were equally effective and there was no significant response to lime. Both nitrate and ammonium-N appeared to be readily utilised by the plant.

Nitrate-N, ammonium-N, and organic matter in relation to profile characteristics of Dark Brown Chernozemic soils

1995 ◽  
Vol 75 (1) ◽  
pp. 55-61 ◽  
Author(s):  
G. J. Beke ◽  
D. P. Graham ◽  
T. Entz
Keyword(s):  
Organic Matter ◽  
Ammonium Nitrogen ◽  
Nitrogen Fertilizers ◽  
Rooting Depth ◽  
Slope Position ◽  
Semiarid Region ◽  
Deep Soil ◽  
Nitrate N ◽  
Ammonium N ◽  
Control Section

Thirty-six deep soil profiles (3.3 m) from a 32-ha irrigated field in southern Alberta were evaluated to determine the relationship between pedogenic development and nitrate-nitrogen (NO3-N), ammonium-nitrogen (NH4-N), and organic matter (OM) content and distribution. The soils were classified into three fine-loamy Dark Brown subgroups. Three classes of solum thickness and slope position were identified. The NO3-N, NH4-N, and OM content in the 3.3-m profile, and below the solum, the control section, and the 1.2-m rooting depth were compared and correlation analyses were conducted between these properties and properties of the saturation extract.The OM content decreased exponentially with increase in profile depth, but the NO3-N and, to some extent, the NH4-N contents varied according to solum thickness regardless of subgroup classification. On average, soils with a thin (< 35 cm) or thick (> 75 cm) solum had a zone of high NO3-N concentration between the 100- and 150-cm depths. This was ascribed to less favorable soil moisture conditions for crop growth on the thin-solum soils and probably more frequent leaching events in the thick-solum soils. Distinctly different correlation coefficients between NO3-N, NH4-N, and OM and the saturation extract properties of the control section supported the series designations of the solum-thickness separations. Solum thickness and topographic position should be considered when applying nitrogen fertilizers or irrigations. Key words: Semiarid region, intermittent irrigation, Chernozemic soils, nitrate-N, ammonium-N, organic matter

scholarly journals PENGARUH DOSIS PUPUK KANDANG AYAM DAN PUPUK NITROGEN TERHADAP PERTUMBUHAN DAN HASIL SELADA (Lactuca sativa L)

2019 ◽  
Vol 7 (2) ◽  
pp. 80
Author(s):  
Andrie Suprayogi ◽  
Dukat Dukat ◽  
Ismail Ismail
Keyword(s):  
Leaf Area ◽  
Lactuca Sativa ◽  
Total Weight ◽  
Chicken Manure ◽  
Nitrogen Fertilizers ◽  
Growth And Yield ◽  
Total Biomass ◽  
Root Volume ◽  
Relative Growth ◽  
Lactuca Sativa L

The experiment was conducted to know the effect of chicken manure doses and nitrogen fertilizers on growth and yield of lettuce (Lactuca sativa L). The experiment was conducted at Kutawaringin Village, Selajambe District, Kuningan, West Java Province, from March until May 2018. The experimnetal design was used Randomized Completely Block Design (RBD) with factorial pattern. Each treatment was repeated three times. The treatment consisted two factors. The first factor was rates  of chicken manure that consisted four levels : K1 (0 ton/ha), K2 (10 ton/ha), K3 (20 ton/ha), K4 (30 ton/ha), while the second factor was nitrogen fertilizers rates which consist three levels : N1 (77 kg/ha), N2 (100 kg/ha), N3 (123 kg/ha). The result showed that there was an interaction effect between chicken manure doses and nitrogen fertilizers on root volume (28 days after planting), total weight per plant, total weight per plot, and total biomass. Independently, chicken manure doses gave significant effect of plant high, number of leafs, leaf area, relative growth rates (28 and 35 days after planting). While nitrogen fertilizers rates effected plant height, number of leaves, leaf area, net assimilation rates (21 days after planting), relative growth rate (21 and 28 days after planting), root volume (35 days after planting). Chicken manure doses 20 ton/ha and nitrogen fertilizers doses 123 kg/ha gave the best result on total weight per plant and per plot which produces 30,56 g per plant and 638,38 g per plot (2,5 ton/ha).

Pengaruh Jenis dan Konsentrasi Pupuk Organik Cair terhadap Pertumbuhan dan Produksi Tanaman Selada (Lactuca Sativa l.) secara Hidroponik

2017 ◽  
Vol 2 (01) ◽  
pp. 115-127
Author(s):  
Siti Hilalliyah ◽  
Intan Sari ◽  
Zahlul Ikhsan
Keyword(s):  
Lactuca Sativa ◽  
Lactuca Sativa L

Sistem hidroponik memungkinkan sayuran ditanam di daerah yang kurang subur dan daerah sempit yang padat penduduknya. Alasan penerapan teknik hidroponik yang utama adalah karena terbatasnya lahan pertanian yang produktif untuk memenuhi kebutuhan manusia yang semakin banyak tiap tahunnya, sehingga dibutuhkan suatu terobosan baru untuk memecahkan masalah tersebut. Penelitian ini telah dilaksanakan pada bulan November 2015 sampai bulan Januari 2016 yang bertempat di kampus Fakultas Pertanian Jl. Propinsi Kecamatan Tembilahan Hulu Kabupaten Indragiri Hilir Propinsi Riau.Metode penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) pola faktorial yang terdiri dari 2 faktor. Faktor pertama adalah jenis POC (N) yang terdiri dari 3 taraf perlakuan yaitu POC Jus Bumi, POC Bonggol Pisang danPOC Limbah Sayuran. Faktor kedua adalah konsentrasi larutan (K) yang terdiri dari 3 taraf perlakuan yaitu 150 ppm, 200 ppm dan 250 ppm. Parameter pengamatan adalah Tinggi Tanaman , Jumlah Daun , Luas Daun , Diameter Batang, Panjang akar ,Volume Akar, Kadar Air, dan Bobot Hasil.Hasil pengamatan menunjukkan bahwa perlakuan jenis POC jus bumi dengan konsentrasi larutan 150 ppm memberikan pertumbuhan dan produksi terbaik untuk tanaman selada secara hidroponik sistem wick. Perlakuan jenis POC limbah sayuran dengan konsentrasi 250 ppm memberikan pertumbuhan dan produksi terbaik selain POC jus bumi sehingga dapat dijadikan sumber POC alternatif.

KHẢO SÁT DƯ LƯỢNG NITRAT VÀ KIM LOẠI NẶNG (Cu, Pb, Zn) TRONG CÂY RAU XÀ LÁCH (Lactuca sativa L.) TRỒNG Ở PHƯỜNG HƯƠNG LONG - THÀNH PHỐ HUẾ

2015 ◽  
Vol 100 (1) ◽  
Author(s):  
Nguyễn Minh Trí ◽  
Nguyễn Hạnh Trinh ◽  
Nguyễn Thị Hoàng Phương
Keyword(s):  
Lactuca Sativa ◽  
Viet Nam ◽  
Lactuca Sativa L ◽  
Tu 45

Xà lách (Lactuca sativa L.) là một loại rau ăn lá quan trọng có giá trị dinh dưỡng và kinh tế cao. Cây Xà lách có đặc điểm là loại rau ngắn ngày, có thời gian sinh trưởng ngắn khoảng từ 45 - 55 ngày, có thể phát triển tốt trên nhiều loại đất, là loại rau ăn sống được sử dụng rất phổ biến trong bữa ăn hàng ngày của người dân Việt Nam nên nó được trồng quanh năm, do vậy vấn đề về chất lượng lại càng phải được quan tâm nhiều hơn. Bài báo này giới thiệu kết quả phân tích về dư lượng nitrat và các kim loại nặng (Cu, Pb, Zn) trong rau Xà lách vụ Xuân - Hè 2012 - 2013 ở phường Hương Long - thành phố Huế. Kết quả nghiên cứu cho thấy: đất trồng rau Xà lách tại phường Hương Long – thành phố Huế đạt tiêu chuẩn về hàm lượng kim loại nặng (Pb, Zn) theo QCVN 03:2008/BTNMT, nhưng hàm lượng Cu và nitrat là khá cao. Rau Xà lách thành phẩm có dư lượng nitrat cao hơn 1,21% so với quy định và các kim loại nặng (Pb, Zn, Cu) tồn dư trong rau lại ở mức cao và vượt tiêu chuẩn cho phép nhiều lần sẽ ảnh hưởng đến sức khỏe của người sử dụng.

EFEITO DO LIXIVIADO DE VERMICOMPOSTO EM DIFERENTES DILUIÇÕES, COMO BIOFERTILIZANTE PARA A CULTURA DA ALFACE (LACTUCA SATIVA L.)

2018 ◽  
Author(s):  
Ferreira Gabriel Menezes ◽  
Souza Antonio Tassio de Oliveira ◽  
Souza Alisson Silva de ◽  
Gomes Igor Thiago dos Santos ◽  
Cunha Denise de Andrade
Keyword(s):  
Lactuca Sativa ◽  
Lactuca Sativa L
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