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 Wysłany: Pon 10:43, 24 Sty 2011 Temat postu: Jinnan rainfed farming of drought _5776 |
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Jinnan rainfed farming of drought
Because of different soil tillage on soil physical impact from the effects of income, significantly reduced the soil temperature, day, regardless of differences in sound, the formation of different rhyme Xushuibaoshang effect. Is the early, middle and late, and regardless of that layer of soil, soil temperature 2O days in a row the case of drought, the crop is high and deep plowing of soil tillage does not follow the low light. The morning is generally the difference is small, the performance of different drought Moisture (Table 2) * 2 high-hsiang mulching shallow soil tillage different times ± Soil Moisture marrow (cm) photo-chu chu naked hopane class farming crop farming pulled high farming Xinjiang collar pulled high crop farming less a debate o1n 0】 2020 ~ 5O6.012.510.339.8Bl2.61.111.110.5813.5714.2l1.311. nl13.431.1 minimum tillage cultivation treatment, the surface straw mulch reduced the direct solar radiation, reducing the soil temperature, soil evaporation reduced significantly, from coral good Moisture. Mulching shallow tillage tillage High 0 ~ 100 cm soil layers of the soil moisture content is higher than the low crop deep plowing, crop cultivating high, high crop shallow plowing treatment. High-mulching shallow tillage tillage soil moisture storage capacity of 1 m 166.8 mm, and more storage than the high stubble 5.3 mm deep plowing, deep plowing and more storage than low stubble 24.7 mm water, high crop stubble is high and deep plowing shallow plowing and low crop cultivating, and more water were 3 mm and 22.4 mm of water. Water conservation measures in different soil tillage effects were as follows: high-light row cover crop tillage> high stubble shallow tillage> stubble cultivating high> low crop cultivating. Different tillage soil water storage capacity also significantly different. In the August 12 to 19 consecutive 73 mm drop ever after the test showed that the high acceptance of reduced tillage crop rain cover most shallow tillage (Table 3). To within 1 meter of soil water storage capacity as an index,[link widoczny dla zalogowanych], high crop cover water storage capacity of shallow tillage tillage 219.3 mm, than the low crop cultivating the 1g9.4 millimeters 19.9 millimeters, is high and more than 19 deep plowing stubble. Mm, than the high stubble shallow plowing the 20g. 3 mm more than 10.0 mm of water,[link widoczny dla zalogowanych], soil tillage is not Ah, the power of water before the order: high-mulching shallow tillage minimum tillage> high stubble shallow tillage> stubble cultivating high> low stubble deep plow. Hong first three years,[link widoczny dla zalogowanych], 'Jude 3 different resistance ± ± soil tillage soil water content effects (due to different soil tillage fallow period soil Xushuibaoshang different capacities, in the early growth stage of wheat, not only to meet the growth and development needs , and in the critical period of water demand remains high water content, according to the jointing stage survey, an average of 0 to 100 cm soil water content is still high stubble cover is expensive with high minimum tillage shallow tillage for: l1.86. high stubble deep plowing to l1.49, deep loosening shallow tillage is the high stubble n.34%, high for the children .27 shallow plowing stubble, low crop cultivating the l1.08. four different tillage practices on soil nutrients in shallow-shaped ring of high Mulching minimum tillage farming improves the soil organic matter, increased soil nutrients, and fertilize the soil. mulching shallow high - 2 years minimum tillage, organic matter was 1.58, lower than the 1.46 increase crop cultivating 0.12. High Mulching 1 year shallow tillage reduced tillage, organic matter of 1.28, higher than the remaining 0.82% of stubble burning increased 0.46, total chlorine, base P 0.0662 and 0.081, respectively, than the high stubble Rao's 0.0568 and 0.068 fire cut more than 0.0094 and 0.0126 points, available phosphorus and potassium, respectively, and the multi-5.1PPm 5.oPPm. five, high-mulching shallow tillage reduced tillage on soil structure of the high ± Mulching shallow tillage improved soil structure and tillage conditions, it avoids a direct impact on ground water, soil sparse orange, good permeability, and control soil compaction, surface cracks often occur. higher Mulching the soil bulk density reduced tillage shallow tillage 1.38 g cm., deep plowing crop was lower than 1.47 grams, centimeters. reduced by 6.1. VI, commercial flap less shallow tillage mulching effect of high energy-saving work mulching shallow tillage than conventional tillage reduce the number of farming, but also saves from the transport, handling,[link widoczny dla zalogowanych], playing crib and other fee, and the stubble covering the surface, but also inhibit the breeding of weeds,[link widoczny dla zalogowanych], can save weeding labor. Conclusion The results show that high-mulching shallow tillage reduced tillage can increase soil organic matter, improve soil physical and chemical properties, increase soil Xushuibaoshang ship force, on wheat yield significant results. to improve the rainfall use efficiency, and labor saving energy, is to solve the North dryland agriculture pathways
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