Peng-fei Li

Effects of Different Culture Conditions to Middle-season Rice "Feng-liang-you-xiang -1"

To study the impact of different culture conditions to the growth and yield, an orthogonal experiment was conducted with four factors ¡X sowing date, basic seedling, nitrogen rate and water depth and three levels (L934)about Mid-season Hybrid Rice Feng-liang-you-xiang-1 for three years ( 2009 ~ 2011). The results showed that: ?The effect of the climatic conditions in different years on the growth duration and yield of mid-season rice is very significant, ?The effect of sowing date on the growth duration and yield of mid-season rice is very significant. As the sowing date is delayed, the growth duration is shortened. (y =-0.2222x +132.98; R =0.9983*, y represents growth duration, and x represents sowing date). When the sowing date was May 1, the yield was the highest, ?The effect of nitrogen rate on the growth duration and yield of mid-season rice is also very significant. As the nitrogen rate increases, the growing duration and yield shows an increasing trend. The overall conclusion was that the yield was the highest when planting on May 1, with a basic seeding number of 480000/hm2, a nitrogen rate of 135kg+120kg+105kg/hm2 and a water depth just casing the surface of field when transplanting.

A Cultivation Technique of Direct Seeding Rice Adapted to Cold Soaked Mud Field in the Mountains Southwest Hubei

The S-W Hubei area is located in the southwest of Hubei, with high-elevation terrain, unique climate, and lots of cold soaked fields. On account of the environmental characteristics of cold soaked mud fields, the procedure of direct seeding cultivation within ridging and plastic film mulching was introduced. The application of this technique can exalt the tiller node, increase the available soil nutrients of cold soaked mud fields, and improve the economic structure and the technical effect of yield, and the corresponding recommendations on the application of mechanical support, economic cost and technical standard were made.

Application of Direct Seeding Cultivation within Ridging and Plastic Film Mulching to Cold Soaked Mud Fields in Southwest of Hubei

Southwest of Hubei, a mountain with high-elevation (1500 m above sea level), distributed lots of cold soaked fields which have a low productivity of rice. In order to raise its productivity, a method of cultivation was tested that is direct seeding cultivation within ridging and plastic film mulching. The results showed that the technique can play a bit to exalt tiller node, increase the effective soil nutrients in cold soaked mud fields, improve economic structure, and develop the technical effect of rice yield. Finally, for its best application in agricultural practice, it gave some suggestion relevant to agricultural machinery use, economic cost and technical standards.

Paddy Eco-characteristics and High Yield Technology in Enshi Mountain Areas

Owing to the effect of topography, morphology and climate, the paddy ecosystem of Enshi mountain areas has significant mountainous characteristics. The climate of paddy fields shows a law of obvious vertical distribution. Whats more, the paddy ecosystem is complex in soil type, excessive in pests and diseases (especially, blast is distributed widely and its harm is serious), frequent in low temperature damage, low in intensive degree and difficult in tillage management. According to these characters, some technical measures were advanced to gain high yield and stable production of rice in Enshi mountain areas. First, the producer should choose varieties with anti- disease (mainly blast), hardy (cool late and autumn winds) and high-yield and do rational distribution with them. Second, we should take a series of steps to suit the needs of local conditions, including dry raising and thin planting, thrown dry rice nursery, semiarid cropping, rational rotation, scientific control of fertilizer and water and so on. Third, farmers should control diseases and insects comprehensively.