The mechanism of increasing crop production of large level ditch planting is analyzed. Meanwhile, fertilizer use efficiency and rainfall use effciency of large level ditch andconvention planting are also analyzed.
It is considered that zero-tillage and remained residue and mulch onthe summer fallow land,level ditch cultivation and strip alternation ofgrass and agricultural crope on the crope land,steep-slope farmlandretired and forest and grass planted are effective control measures ofrill erosion.
Two years experiments in the years 1987-1988 proved that weat cultivatedby level furrows in sloping land had a remarkable yield increase with a yieldincrease fo 7% per mu higher than level cultivation. Wheat planted by wheatseeder with fertilizer applied or animal pulling plow to open furrows withfertilizer added to and seeds planted has a uniform seed emergence. Per mubasic seedlings are 33.3% higher than those by level planting.
The results show that the sequence of conservation benefits from high to low is like: caragana→intercroping of caragana and grss→grass alone→band intercroping of crop and grass→crop levelling planting→crop general planting.
This paper has analysed genesis and development of rill erosion andits control measures on slope land based on simulated rainfall andfield investigation data.It is considered that in the detachmentflow-way of slope surface,as the runoff erovisity is great enough to washsoil lump and to form waterfalls,further the waterfalls evolving intoheadcuts in rill,rill erosion occures and develops.Unconnected rillsare formed by downward erosion of headcuts and runoff washing torill bottom between headcuts,drawing back...
This paper has analysed genesis and development of rill erosion andits control measures on slope land based on simulated rainfall andfield investigation data.It is considered that in the detachmentflow-way of slope surface,as the runoff erovisity is great enough to washsoil lump and to form waterfalls,further the waterfalls evolving intoheadcuts in rill,rill erosion occures and develops.Unconnected rillsare formed by downward erosion of headcuts and runoff washing torill bottom between headcuts,drawing back of the headcuts and collap-sing of the rill wall.Thus the connection of many unconnected rillheadeuts drawing back forms connected rill in a flowway of the detach-ment flow.Meantime,merging and connecting of the rills happenbecause rainfall and runoff erovisity is more or less than soil erosiondurability to change in time and space.The above process not onlyfurther promotes genesis and development of rill,but also creates severerill erosion.It is considered that zero-tillage and remained residue and mulch onthe summer fallow land,level ditch cultivation and strip alternation ofgrass and agricultural crope on the crope land,steep-slope farmlandretired and forest and grass planted are effective control measures ofrill erosion.
Two years experiments in the years 1987-1988 proved that weat cultivatedby level furrows in sloping land had a remarkable yield increase with a yieldincrease fo 7% per mu higher than level cultivation.Wheat planted by wheatseeder with fertilizer applied or animal pulling plow to open furrows withfertilizer added to and seeds planted has a uniform seed emergence.Per mubasic seedlings are 33.3% higher than those by level planting.When levelfurrow planting wheat was carried out,fetrilizer application was concentrated.Riges...
Two years experiments in the years 1987-1988 proved that weat cultivatedby level furrows in sloping land had a remarkable yield increase with a yieldincrease fo 7% per mu higher than level cultivation.Wheat planted by wheatseeder with fertilizer applied or animal pulling plow to open furrows withfertilizer added to and seeds planted has a uniform seed emergence.Per mubasic seedlings are 33.3% higher than those by level planting.When levelfurrow planting wheat was carried out,fetrilizer application was concentrated.Riges and furrows can check and store rainfall water.Thus,moisture contentsin 0-40 cm are 2.2-0.2% higher than that in level planting field.And soiltemperature in 0-10 cm soil layer is 0.85℃-0.07℃ higher than that in levelplanting field.Spring tillering adility of wheat in level furrow field isstrengthened Total stems per mu in spring are 9.1% higher than those inlevel planting wheat field;dry matter accumulation is 60.3%higher than thatin the levelplanting wheat field;permu ears are 2.6% higher than those in thelevel planting wheat field;grains per ear is 1.3 higher in the level plantingwheat fields;and 1000 grain weight increases 0.9 gram.Three kinds of spacesare adopted to plant winter wheat in three types of sloping lands with 10°,14°,and 22.7℃.Wheat yield is in positive correlation with increasing slopes andwidening spaces.Per mu fertilizer added to is N2.5+P1.25kg,N3.5+P1.75kg,N4.5+P2.25kg.Fertilizer application is also in positive correlation with per muyield.Per mu yield increase rate reaches 49.25%,of which N2.5+P1.25kgapplied to per mu produces the best outputs with a marginal productive value.This kind of fertilizer input level is of extensively great values of extensionon the Weibei Highland and in hilly and gully regions on the Loess Plateau.
In this paper, based on experiment data from different treatment such as grass-bush band intercropmg. Grass-crop band rotation for 6yelus, different planting patterns were classified with their conservation benefits And its accuracy is verified using Bayes stepwise discrimination analysis.Then, the Conservation benefits of ecch planting pattern was analyged and evaluated. The results show that the sequence of conservation benefits from high to low is like: caragana→intercroping of caragana and grss→grass alone→band...
In this paper, based on experiment data from different treatment such as grass-bush band intercropmg. Grass-crop band rotation for 6yelus, different planting patterns were classified with their conservation benefits And its accuracy is verified using Bayes stepwise discrimination analysis.Then, the Conservation benefits of ecch planting pattern was analyged and evaluated. The results show that the sequence of conservation benefits from high to low is like: caragana→intercroping of caragana and grss→grass alone→band intercroping of crop and grass→crop levelling planting→crop general planting.
水平沟种植
large level ditch planting
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