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很多农户在收获豆类作物时,习惯于用手把秸秆连根拔起,这种收获方法很不科学,无形中白白浪费了许多有机固氮肥,对种植下季作物十分不利.由于豆类作物是一种固氮作物,其根部的根瘤菌具有从空气中固定游离态氮的作用.据测定,一亩豆科作物能从空气中固氮7.5～10kg,相当于35～50kg硫酸铵.如果在收获时连根拔掉,就会带走贮存氮素的根瘤.因此,农民在收获豆科作物时,最好用镰刀割,切莫连根拔,为下季粮食增产奠定基础.
Many farmers in the harvest of legumes, accustomed to uprooting the straw by hand, this method of harvest is unscientific, virtually wasted a lot of organic nitrogen fixing fertilizer, the planting of next season crops is very unfavorable.Because beans are a Species of nitrogen-fixing crops, rhizobia at its roots with free nitrogen from the air fixed role.It was determined that one acre of leguminous crops nitrogen fixation from the air 7.5 ~ 10kg, equivalent to 35 ~ 50kg ammonium sulfate. , It will take away the nodules that store nitrogen, so when harvesting leguminous crops, peasants are best to cut with falcrats and not cut corners to lay the foundation for the next season’s grain production increase.