在大田高产栽培条件下，研究了不同施氮水平对豫麦49-198根际微生物和土壤酶活性的影响。
The effect of nitrogen fertilizer on soil enzymatic activity and rhizosphere microorganisms of Yumai 49-198 root system was studied in this paper.
2007年夏季，在一般大田常规栽培条件下，通过分期采摘茎尖的方法，对叶菜型甘薯品种百薯1号的薯块产量和品质进行了研究。
Under normal field condition, using spot picking tip method, the tuber yield and quality of sweet potato Baishu 1 as leaf-vegetable sweet potato were studied in 2007 summer.
在大田栽培条件下，研究了施钾量对北沙参生长、产量和品质的影响。
Under field condition, effects of potassium application rate on growth, yield and quality of Glehnia Littoralis roots were studied.
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