摘要
对玉米和小麦秸秆在小麦上的增产效果以及对化肥肥效的影响，作物秸秆分解的最适Ｃ／Ｎ比值进行了研究，结果表明，水浇地秸秆的增产效果比旱地好；施用秸秆可以提高化肥肥效，增加小麦产量，减少化肥投入。
With field experiment, the effects of crop residues on wheat yield were studied in loess soil. The results were as follows:① Corn stalks did not show its effect on wheat yield in the first year in Weibei dry area in Shaanxi province, but shown its effect on wheat yield in irrigation land in Guanzhang area of Shaanxi province; the wheat yield was increased 18.8% by corn stalks. ② Wheat yield increase much higher by applying manure comparing with corn stalks, application of manure increase 33.2% yield comparing with the corn stalks. ③ Corn stalks + Chemical fertilizer N & P or Manure + Chemical fertilizer N & P increase yield 9 5% and 35.2% respectively comparing with only use Chemical fertilizer N & P in the same rate. ④ The effects of corn stalks and wheat straw on the wheat yield are not the same. The wheat straw shown better yield increase than that of corn stalks. If increases 352 kg/hm 2 (12%) of wheat by application of wheat straw than corn stalks. ⑤ The plough under wheat straw shown the higher yield on wheat comparing with that of covering it on soil surface in winter and the yield increase was 14.2% C/N ratio about 30 shown the highest yield and it is the best ratio for using crop residues in this experimental region. If the C/N ratio is grow up, wheat yield will decrease because the decomposition process absorbs soil N and leads to poor absorb with N by crop roots. The ratio 30 is the recommendation for using crop residues.
出处
《西北农业学报》
CAS
CSCD
1997年第1期50-53,共4页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
作物秸秆
小麦
碳氮比
Crop residues
Wheat
C/N ratio
