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棉花免耕高密植栽培是根据我省地处中亚热带,气候温暖、无霜期长、日照足、雨量充沛、适宜棉花生长发育有利的一面。但4月常低温阴雨,夏季多有大雨、暴雨,7～8月高温伏旱,9月以后气温逐渐下降,秋雨来临不利一面。为了趋利避害,扬长避短,我们采取改旱播套种为春作物收后播种;改稀植为密植:改深耕为不耕地:改多次中耕除草为前期用除草剂灭草,中、后期以密控草:改蹲苗为促苗。经连续8年定位和多点试验及大面积示范,它具有以下显著特点:
Cotton no-till high density planting cultivation is based on the province is located in the subtropical, warm climate, long frost-free period, sufficient sunshine, abundant rainfall, suitable for cotton growth and development favorable side. However, in April, it is often rainy in low temperature, with heavy rain and heavy rain in summer and high temperature and drought in July and August. After September, the temperature gradually drops and the autumn rain comes on the unfavorable side. In order to profit and avoid disadvantages, to avoid weaknesses, we have to change the dry planting intercropping spring crops for planting and sowing; change thin planting close planting: change deep plowing for the non-cultivated land: change more cultivation and weeding for the early use of herbicides to weed, in the late Control grass: change Dunmiao to promote seedling. After eight years of continuous positioning and multi-point test and a large area demonstration, it has the following salient features: