江苏省里下河地区“沤改旱”种绿肥的经验

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1.沤改旱在田间工程上的要求是深沟狭畦,改善土壤水分条件。畦宽6至7尺,一般沟深1尺,腰沟和边沟深1.2尺。2.新沤改旱田一定要施用灰肥或磷肥。磷肥用量与土壤肥力状况和播种方法有密切关系。每亩用10斤过磷酸钙作种肥是在磷肥供应有限的情况下的一种经济有效的施用方法。开塘点播作为基肥施用时,肥力较高的鸭屎土每亩施用20斤过磷酸钙,肥力较低的小粉浆土每亩可施用30斤。磷肥以作种肥或基肥为宜,追肥效果不好。3.几种绿肥接种根瘤菌的效果不一样,黄花苜蓿和苕子接种根瘤菌的效果不显著,紫云英接种根瘤菌的效果极为显著,可以提高产量百分之二百至一千。它是新区发展紫云英的关键措施。4.里下河地区以早中稻茬为多,绿肥播种以9月中旬较为适宜,播种方法一般以板田开塘点播为宜,既可节省劳畜力,而且出苗亦较整齐。黄花苜蓿的泥浆泼浇法的效果与土壤水分条件有关,在干旱情况下,不及开塘点播的效果好。5.在冬干和春旱的情况下,灌溉是重要的增产措施。苗期灌一次水,可以保证全苗;越冬前再灌一次水,可以促进壮苗。如果再遇春旱,返青后仍需灌水一、二次。6.绿肥苗期每亩泼浇五担粪水提苗,可以起到以小肥调大肥的作用。 1. 沤 change drought in the field of engineering requirements is deep groove Narrow, improve soil moisture conditions.畦 width 6 to 7 feet, the general ditch 1 foot deep, waist groove and ditch deep 1.2 feet. 2. New 沤 change dry field must be applied gray or phosphate fertilizer. Phosphate fertilizer use and soil fertility conditions and sowing methods are closely related. Using 10 kg of superphosphate per acre as seed fertilizer is a cost-effective application method in the case of limited supply of phosphate fertilizer. Kai Tong on-demand as a base fertilizer application, high fertility duck feces soil application of 20 kg per acre superphosphate, low fertility of small silty soil per acre can be applied 30 pounds. Phosphate fertilizer for fertilizer or base is appropriate, top dressing effect is not good. 3. Some green manure inoculation Rhizobia effect is not the same, Medicago trichosanthes and Rhizobium inoculation effect is not significant, the effect of Inoculation Rhizobia is extremely significant, can increase the yield of two hundred to one thousand. It is a key measure for the development of Shiye Yunying in the New Zone. 4. Lixiahe area as early as mid-crop stubble, green manure sowing in mid-September is more appropriate, sowing method is generally appropriate to open the pond Tin Tin on demand, both labor-saving labor, and the emergence of more neat. The effect of mud pouring on alfalfa is related to the soil moisture condition. Under the condition of drought, it is not as good as the on-demand of Kai Tong. 5. Irrigation is an important stimulant in winter and spring drought conditions. A seedling irrigation water, you can ensure that the whole seedlings; before reperfusion irrigation water, can promote strong seedlings. If the event of spring drought, still need to turn green irrigation one or two times. 6. Green manure sprinkling water per mu seedlings poured five acres of Miao Miao, can play a small fertilizer to increase the role of fat.
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