Evaluation Studies On Conservation Tillage Technology

The objective of this study was to evaluate yield effect,comprehensive benefits,the effect factors of farmers'adaptive conservation farming technique (CFT)in dissimilarity ecosystem area. An one by one investigation of peasant household was carried out in main demonstration area of conservation tillage.By using the methods including agronomy,economics and sociology integrated appraise, with a case of the Northeast China plain, the North China plain, the Chengdu plain, the Northwest China oasis,the main results could be attained as follows:(1) Analysis on farming institution,farmer adoption of conservation tillage in main grain producing area of china.The results show that: minimum tillage is main conservation tillage types,combined with no-tillage ,straw coverage and others.differet region manifestation: minimum tillage is main in the Northeast China plain,straw coverage and no-tillage is main types in the Chengdu plain, straw coverage, rotary tillage, minimum tillage and no-tillage comprehensive measure in the Northeast China plain and the Northwest China oasis. he conservation tillage adoption rate is higher in the North China plain and the Chengdu plain, the conservation tillage adoption rate is lower in Northeast China plain and the Northwest China oasis. Some of conservation tillage modes get peasant household widespread approve. they are wide and narrow spacing rotation planting of leaving high stubble and cutting stubble combine ridge of tillage mode in the Northeast China plain, rotary tillage seeding technique for wheat under the bestrow of the corn stalk, no-tillage seeding technique for corn and others under the bestrow of the whole wheat stalk in the North China plain, no-tillage seeding technique for wheat and others under the bestrow of the whole rice stalk in Chengdu plain.(2) Analysis on farmer cognition in main grain producing area of china.By using questionnaire survey methord.①The main ways of peasant knowing and acceptance are vicinity farmer,government demonstration and propaganda guide.②Saving labour of conservation tillage obtained farmers'general accreditation.③The lower conserving seedling rate and the poorer crop growth vigor is the main causes of yield descending.However,diseases and insect pests aggravation,grass pests aggravation,the poorer moisture conservation effect embodied on various areas.④Some of conservation tillage modes get peasant household widespread approve. they are wide and narrow spacing rotation planting of leaving high stubble and cutting stubble combine ridge of tillage mode in the Northeast China plain, rotary tillage seeding technique for wheat under the bestrow of the corn stalk, no-tillage seeding technique for corn and others under the bestrow of the whole wheat stalk in the North China plain, no-tillage seeding technique for wheat and others under the bestrow of the whole rice stalk in Chengdu plain. They have obviously effect of yield increase.⑤Investment increasing more obviously in Sowing on ridge side and returning stubble of the Northeast China plain, returning field of corn straw+ sowing wheat under no tillage and returning field of corn straw +sowing wheat under rotary tillage of the North China plain.⑥Income and gross increasing more obviously in returning field of corn straw +sowing wheat under rotary tillage of the North China plain, wide and narrow spacing rotation planting of leaving high stubble and cutting stubble combine ridge of tillage mode and sowing on ridge side and returning stubble in the Northeast China plain. (3)Analysis on influence factors of farmer adoption ,By using multiple element and linear regression statistical method. The results show that:the premise of farmer received technology is the media,the technicians in agriculture's introduction and training;yield increase is internal cause of farmer adoption;government demonstration and propaganda guide is main driving mechanism of conservation tillage; no-matching equipment baffle extension of conservation tillage technology.(4)Comprehensive evaluation of conservation tillage's yield effect has been primarily establish and the main conservation tillage's mode have been comprehensive evaluated.By using analytic hierarchy process(AHP),all of variance method and the fuzzy mathematical evaluation. The results show that:The conservation tillage modes of more suitable for extension application in local area are: wide and narrow spacing rotation planting of leaving high stubble and cutting stubble combine ridge of tillage mode in the Northeast China plain, rotary tillage seeding technique for wheat under the bestrow of the corn stalk, no-tillage seeding technique for corn and others under the bestrow of the whole wheat stalk in the North China plain, no-tillage seeding technique for wheat and others under the bestrow of the whole rice stalk in Chengdu plain, no tillage of returning the high stubble in the Northwest China oasis.The method provides beneficial reference for choicing conformable conservation tillage.