scholarly journals "MAKALAH AGRIBISNIS TANAMAN PERKEBUNAN"

2018 ◽  
Author(s):  
Silva oksarinda
Keyword(s):  
Double Cropping ◽  
Relay Cropping

Tumpang sari adalah suatu bentuk pertanaman campuran (polyculture) berupa pelibatan dua jenis atau lebih tanaman pada satu areal lahan tanam dalam waktu yang bersamaan atau agak bersamaan. Tumpang sari yang umum dilakukan adalah penanaman dalam waktu yang hampir bersamaan untuk dua jenis tanaman budidaya yang sama, seperti jagung dan kedelai, atau jagung dan kacang tanah. Dalam kepustakaan, hal ini dikenal sebagai double-cropping. Penanaman yang dilakukan segera setelah tanaman pertama dipanen (seperti jagung dan kedelai atau jagung dan kacang panjang) dikenal sebagai tumpang gilir (relay cropping).Tumpang sari dapat pula dilakukan pada pertanaman tunggal (monokultur) suatu tanaman perkebunan besar atau tanaman kehutanan sewaktu tanaman pokok masih kecil atau belum produktif. Hal ini dikenal sebagai tumpang sela (intercropping). Jagung atau kedelai biasanya adalah tanaman sela yang dipilih.

COMPARISON OF SINGLE CROPPING, RELAY CROPPING AND DOUBLE CROPPING OF SOYABEANS WITH WHEAT USING CULTIVAR BLENDS

1997 ◽  
Vol 33 (4) ◽  
pp. 477-486 ◽  
Author(s):  
S. JACQUES ◽  
R. K. BACON ◽  
L. D. PARSCH
Keyword(s):  
Leaf Area ◽  
Cropping Systems ◽  
Branch Number ◽  
Node Number ◽  
Land Equivalent Ratio ◽  
Net Returns ◽  
Double Cropping ◽  
The Mean ◽  
Relay Cropping ◽  
Pure Lines

Comparisons of single cropping, double cropping and relay cropping of soyabeans (Glycine max) with wheat (Triticum aestivum) were made at two sites in Arkansas over a two-year period. The comparisons were made using both soyabean blends and their component cultivars. In relay cropping the yields of pure lines of soyabeans were reduced by 17% compared with single-cropped soyabeans, but the yield of wheat in relay cropping was 15% less than in double cropping. Double cropping reduced the branch number, plant height, node number and leaf area of soyabeans compared with single cropping, but relay cropping reduced only node number and leaf area. Both double cropping and relay cropping gave greater land equivalent ratio (LER) values than single cropping, and double cropping gave greater LER values than relay cropping. Net returns were lowest with single cropping and greatest with double cropping. Soyabean blends gave yields similar to the mean of the component genotypes in all three cropping systems, and the net returns of blends were similar to those of the means of component genotypes.

Suitable Maturity Period and Accumulated Temperature of Summer Maize in Wheat-maize Double Cropping System

2018 ◽  
Vol 44 (1) ◽  
pp. 137
Author(s):  
Bai-Zhao REN ◽  
Fei GAO ◽  
Yu-Jun WEI ◽  
Shu-Ting DONG ◽  
Bin ZHAO ◽  
...  
Keyword(s):  
Cropping System ◽  
Summer Maize ◽  
Double Cropping ◽  
Maturity Period ◽  
Accumulated Temperature

Effects of Double Cropping of Wheat and Cotton on Fat and Protein Metabolism of Cotton Embryo

2015 ◽  
Vol 41 (8) ◽  
pp. 1237 ◽  
Author(s):  
Tian-Yao SHEN ◽  
Xiang-Bei DU ◽  
Hong-Kun YANG ◽  
Yu-Xiao ZHANG ◽  
Yu-Fei ZHENG ◽  
...  
Keyword(s):  
Protein Metabolism ◽  
Double Cropping

The post-effect of lucerne on nitrate-N accumulation in a maize-wheat double cropping long-term experiment

2000 ◽  
Vol 28 (1-2) ◽  
pp. 147-152
Author(s):  
T. Szalai ◽  
F. H. Nyárai ◽  
S. Holló ◽  
M. Birkás
Keyword(s):  
N Accumulation ◽  
Double Cropping ◽  
Nitrate N ◽  
Term Experiment ◽  
Long Term Experiment

Functional soil organic matter fractions in response to long-term fertilizer management in a double-cropping paddy field of southern China

2021 ◽  
pp. 1-9
Author(s):  
Haiming Tang ◽  
Chao Li ◽  
Lihong Shi ◽  
Li Wen ◽  
Kaikai Cheng ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Paddy Field ◽  
Southern China ◽  
Rice Paddy ◽  
Chemical Fertilizer ◽  
Protection Mechanism ◽  
Rice Paddy Field ◽  
Double Cropping

Abstract Soil organic matter (SOM) and its fractions play an important role in maintaining or improving soil quality and soil fertility. Therefore, the effects of a 34-year long-term fertilizer regime on six functional SOM fractions under a double-cropping rice paddy field of southern China were studied in the current paper. The field experiment included four different fertilizer treatments: chemical fertilizer alone (MF), rice straw residue and chemical fertilizer (RF), 30% organic manure and 70% chemical fertilizer (OM) and without fertilizer input as control (CK). The results showed that coarse unprotected particulate organic matter (cPOM), biochemically, physically–biochemically and chemically protected silt-sized fractions (NH-dSilt, NH-μSilt and H-dSilt) were the main carbon (C) storage fractions under long-term fertilization conditions, accounting for 16.7–26.5, 31.1–35.6, 16.2–17.3 and 7.5–8.2% of the total soil organic carbon (SOC) content in paddy soil, respectively. Compared with control, OM treatment increased the SOC content in the cPOM, fine unprotected POM fraction, pure physically protected fraction and physico-chemically protected fractions by 58.9, 106.7, 117.6 and 28.3%, respectively. The largest proportion of SOC to total SOC in the different fractions was biochemically protected, followed by chemically and unprotected, and physically protected were the smallest. These results suggested that a physical protection mechanism plays an important role in stabilizing C of paddy soil. In summary, the results showed that higher functional SOM fractions and physical protection mechanism play an important role in SOM cycling in terms of C sequestration under the double-cropping rice paddy field.

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