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土壤地力是指土壤为植物生长供应和协词营养条件和环境条件的能力。它包括水、肥、气、热四大肥力因素,而水、肥、气是物质基础,热是能量的条件.其特征是四种肥力因素的综合反映,只有各肥力因素同时存在,而且处于相互协调状态下,土壤地力才能发挥作用。但是,近年来,在农业生产中却出现了“绿的(绿肥)不种,黄的(人粪尿)少要或不要,粗的(土杂肥)少挑或不挑,湿的(塘泥)不捞,白的(化肥)为主”的不良倾向。致使土壤有机质逐年下降,出现土壤板结、瘦脊,地力失调和衰退的趋势。如不采取措施改变这种不良倾向,地力衰退的现象将会越来越严重,势必影响农业
Soil fertility refers to the ability of the soil to supply plant nutrients and conditions and environmental conditions. It includes four fertility factors of water, fertilizer, gas and heat, while water, fertilizer and gas are the material basis and heat is the condition of energy, which is characterized by the comprehensive reflection of four fertility factors, only the fertility factors exist at the same time In a coordinated state, soil fertility can play a role. However, in recent years, “green (green manure) species have emerged in agricultural production, with little or no yellow (human waste), less (or not) Pond mud) not fishing, white (chemical fertilizer) based ”undesirable tendency. As a result, soil organic matter decreased year by year with the tendency of soil compaction, lean ridge, imbalance and decline of soil fertility. If no measures are taken to change such undesirable tendencies, the decline in soil fertility will become more and more serious, which will inevitably affect agriculture