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1964~1965年,我站在楊家园子公社吳家坪基点,进行了荞麦施用过磷酸鈣小区試驗和大田示范。結果上等肥沃土壤,每亩施硫銨30斤(加牲口粪960斤),比对照增产88%。施硫銨及过磷酸鈣各30斤(加牲口粪500斤),比对照增产68%。单施磷比对照反而减产9.2%(对照处理施牲口粪300斤)。在中等和下等(偏中)肥力施用氮肥及氮磷
From 1964 to 1965, I stood at the base of Yangjiayuan Sub-district of Wujiaping and experimented with Sulfate Test and field demonstration of buckwheat. The results of the best fertile soil, ammonium sulfate 30 kg (plus livestock dung 960 kg), 88% more yield than the control. Thionized ammonium and superphosphate 30 kg (plus livestock dung 500 kg), 68% more yield than the control. On the contrary, the yield of single application of phosphorus was reduced by 9.2% (compared with 300 kg of treated livestock manure). Fertilize medium and low (moderate) fertilizers with nitrogen and nitrogen and phosphorus