求翻译：产前种植绿肥增加土壤有机质含量，产中以蛙粪和固氮蓝藻为有机肥料，产后将秸秆还田增加土壤有机质和改良土壤团粒结构。是什么意思？

Pre-planting green manure to increase soil organic matter content, production of manure and nitrogen-fixing blue-green algae to frogs as organic fertilizer, straw postpartum to increase soil organic matter and improve soil aggregate structure.

Pre-natal planting green manure increased soil organic matter content, and output to a frog in septic tanks and nitrogen-fixing Spirulina organic manure, post-natal will Straw also Tin increased soil organic matter and improving soil structure granule.

The pre-natal planter green manure increase soil ulmin content, produces take the frog excrement and the nitrogen fixation blue-green alga as the organic fertilizer, post-natal straw stalk also field increase soil ulmin and improvement soil granular structure.

Prenatal planting green manure to increase soil organic matter content, to frog in manure and nitrogen-fixing cyanobacteria in organic fertilizers, postpartum straw to increase soil organic matter and soil aggregate structure.

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