On a fertile land, a winter wheat cultivar with medium spike size Tat 876161 was chosen and planted in sowing patterns in
which 20cm
narrow row space paired with 30cm, 40cm, 70cm or 100cm wide row space respectively were designed, and thus, forming four different
strip patterns of 50(20+30)cm, 60(20+40)cm, 90 (20+70)cm and 120(20+100)cm, taking the conventional 20cm equal row spacing (strip width pattern of 20 + 20) pattern as control. Five different seed rates were employed, ie, one metre single row had 15, 30, 45, 60 or 75 seedlings respectively. The main results are as follows: (1)The single row yield(y) increases in the way y=a/x + b as the wide row space(x) changes from narrow to wide. (2) The yield of strip type (20+ 20) (CK), (20+ 30),and (20+40) decreases markedly as the seed rate change from low to high,while strip type (20+ 70) and (20+100) decreases slightly. Each strip type acquires peak yield throuth employing small seed rate(15 seedlings/m). (3)As the wide row space (x) changes from narrow to wide, yield per 666. 7m~2 (y) changes in the way y = axe~bx. The calculated wide row space of peak yield of 15, 30, 45, 60 and 75 seedlings/m is 39. 55,41. 11, 44. 10, 43. 93 and 44. 93cm respectively. Use the average of the five seed rates, the formula is y = 36. 60684xe~-2.353119×10~-2x, r = 0. 9946189~**, and the calculated peak yield wide row space is 42. 50cm. (4) (20+40) pattern (paired row sowing with 20cm narrow row space and 40cm wide row space) can best coordinate the relations between spike number, grain number per spike and grain weight,thus it has the peak yield. Moreover,40cm wide row space is suit able for intercropping winter or spring vegetable crops and for relay cropping corn,peanut, cotton,soybean or ginger etc.