The grain yield of soybean continuous cropping for 2 years in alfalfa stubble was more than 112.5 kg/ hm~2,an insignificant increase of 5% than that of soybean continuous cropping for 2 years in maize stubble,and more than 307.5 kg/hm~2,a significant increase of 14.99% than that of soybean continuous cropping for 2 years in soybean stubble.
The grain yields of soybean continuous cropping for 2 years in maize stubble was more than 195.0 kg/hm~2,an insignificant increase of 9.5% than that of soybean continuous cropping for 2 years in soybean stubble.
The effects of different crop stubbles on grain yield and agronomic characters of soybean continuous cropping was studied in the Longzhen Farm of Farm Bureau Directly Under Shenyang Military Area in 2004.The results showed that the soybean grain yield of soybean continuous cropping for 2 years in alfalfa stubble,that for 2 years in maize stubble and that for 2 years in soybean stubble were 2 359.5,2 247.0 and 2 052.0 kg/hm~2,respectively.
Average yield of wheat in wheat stubble is 1 876.35 kg/hm~2, wheat yield in soybean stubble is 1540.78 kg/hm~2, yield of continuous cultivation wheat is 1419.37 kg/hm~2, among three reach 1% signicance difference level.
Average yield of soybean in wheat stubble is 1613.63 kg/hm~2, soybean yield in cole stubble is 1574.64 kg/hm~2, yield of continuous cultivation soybean is 1428.06 kg/hm~2, among three reach 5% significance difficance level.
The research shows that rotation yield of corn, wheat and soybean are more high than continuous cultivation in six years. Among them average yield of corn in soyben stubble is 5615.90 kg/hm~2, average yield of continuous cultivation corn is 4 909kg/hm~2, between two reach 1% significance difference level.
At the end of the growing period, the proportion of bacterium to fungus in rhizosphere and root surface decreased by 57.3% and 47.5% respectively in first-planting treatment, while the numbers were 93.2% and 63.1% in replanting treatment.
The proportion of anctinomycete to fungus in rhizosphere and root surface increased by 4.75 and 8.25 times respectively in first-planting treatment, while the numbers were 42.6% and 1.26 times in replanting treatment.
The proportion of anctinomycete to fungus in rhizosphere and root surface increased by 4.75 and 8.25 times respectively in first-planting treatment, while the numbers were 42.6% and 1.26 times in replanting treatment.
At the end of growing period, the proportion of bacterium to fungus in rhizosphere and root surface decreased by 57.3% and 47.5% respectively in first-planting treatment, while the numbers were 93.2% and 63.1% in replanting treatment.
The purported benefits of conservation tillage and continuous cropping in agricultural systems include enhancement of soil ecosystem functions to improve nutrient availability to crops and soil C storage.
Replant diseases in strawberry caused by Rhizoctonia solani, Fusarium oxysporum and Verticillium dahliae are serious problems for its sustainable production under continuous cropping.
The results are discussed in terms of a possible method of encouraging the transfer of parasites from sorghum to short-duration pigeonpea by producing a more continuous cropping environment.
The insect fauna in paddy fields is composed of resident, migratory and aquatic species each corresponding to the continuous cropping of rice in the same field, harvesting rice as an annual crop, and originating from still water habitats in wetlands.
Although soybeans had a dominant role in the continuous cropping systems studied, the total N contents of these systems were lower than those of the natural Cerrado.
A series of microbial associations capable of the biodegradation of various petroleum oils, emulsols, and crude oil were obtained by selection during periodic or continuous cultivation.
xylosoxidanstransformed the maleate (30.0 g/l) entirely in 96 h during batch cultivation and only 15.0 g/l of the maleate in continuous cultivation at a flow rate of 0.03 h-1.
The rate of bacterial degradation of SCN- under continuous cultivation in a chain of reactors was found to depend on its concentration, the medium flow rate, agitation rate, and the pattern of carbon source supply and could exceed 1 g/(l day).
Continuous cultivation was carried out in a 1.25-L fermentor at 30°C, pH 5.5, 300 rpm, and a dilution rate of 0.03/h, using oxygen transfer coefficients of 10,20, and 30/h.
A benthic community of sessile metazoans dominated by coralline sponges (e.g.Acanthochaetetes andVaceletia) is found within a Cenomanian-Turonian deep water hardground succession cropping out at the coastal area of the Bay of Biscay near Santander.
This paper is focused on the facies associations of an Early-Middle Norian stratigraphic succession cropping outin the Northern Calabria (Buonvicino, Cosenza).
We were unable to demonstrate a cowpea-broccoli succession cropping system which consistently reduced fertilizer N inputs without some type of adverse effect on the broccoli crop.
The sedimentary succession cropping out in central Brianza, in an area embracing the territories of Besana Brianza, Briosco (Milan Province), Arosio and Inverigo (Como Province), is properly ascribed to the Lombardian Gonfolite Group.
There have been isolated reports on the technique of segmental resection of the tumor-bearing segment complete with the skin, and replanting the distal arm or forearm with or without neurovascular repair.
A total of 39 patches were selected that represented five recognized grassland habitat types (Mueggler and Stewart 1980), as well as two disturbed types (replanting within a known habitat type).
Dry thalli were extracted with water-free acetone and, after this treatment, were found to be fully viable to the extent of continued growth after replanting in the field.
Kura clover can be managed as a living mulch in corn with little or no corn whole-plant or grain yield reduction and clover will recover to full production within 12 mo without replanting.
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