Effects of Different Density and Nitrogen Fertilizer on the Seed Production of Mianyou 11

Zhou Yugang (Mianyang Institute of Agricultural Sciences, Sichuan Province) Pang Chunpeng Luo Ning Tang Yan (Sichuan Guohao Seed Co., Ltd.)

Mianyou ll is a recessive nuclear sterile two-line hybrid cultivated by the Mianyang City Agricultural Research Institute. It has been producing seeds since 1999 and its products are very popular. The appropriate density and nitrogen fertilizer application in the seed production is a key link. Through this experiment, the appropriate density and nitrogen application rate for the two-line nuclear sterile Mianyou 11 are estimated to guide the production of field seed production. Improve seed production.

Table 1 Factor Level Table

factor

-γ

-1

0

1

Gamma

Density X1

90000

147120

285000

422880

480000

Nitrogen fertilizer X2

0

68.85

225.00

384.15

450.00

1 Materials and Methods

1.1 Test materials

Mianyou 11 (9AB-l× Mianhui No. 6), the female parent is a two-line recessive genic male sterile line, and the sterile line rate is about 50%. It is necessary to remove the fertile lines in time before the initial flowering.

1.2 Test treatment and field design Two-factor quadratic regression rotation combination design (Table 1), random block arrangement, plot area 22.4m2 (4.0m x 5.6m), two rows of male parents, equal rows, row spacing 0.4m, The father's pit is 0.27m, between the groups is 0.6m, and the interval is 0.2m.

1.3 Test time, location and profile

The experiment was conducted from September 2006 to June 2007. The pilot planted the seed production base in Lixin Town, segregated the security, and made rice in advance, with medium fertility, and two plows and two plows before sowing. After emergence of rape, 75kg/hm2 urea plus defecation water was used for fertilization management. During the seedling stage, pests were removed and the fertile lines in the mother line were promptly removed before the initial flowering. On September 15th, the father was sowed. On the 18th of September, the female parent was planted and transplanted on October 20. Fertilizer used 60% of nitrogen fertilizer and 40% of topdressing fertilizer. Phosphorus and potassium fertilizers were all used at the same time as base fertilizer. Each plot was prepared when transplanted. 30 female parent plants.